Timezone data installer code

The code here is used by the system server to install timezone data updates.
It is separate so it can be tested.

Scripts are included that build an "update bundle" (a zip file with a
well-defined contents).

ConfigBundle contains logic to extract the bundle safely.
TzDataBundleBuilder is used in the test and tools to construct a bundle.

The scripts in tools is a placeholder and will evolve.
bionic/libc/tools/zoneinfo tools will likely move there so they can be
integrated more closely.

An app is included for testing updates.

Bug: 19941636
Change-Id: Id0985f8c5be2f12858ee8bf52acf52bdb2df8741

4 files changed, 123 insertions, 0 deletions

diff --git a/tzdata/update_test_app/res/drawable/ic_launcher.png b/tzdata/update_test_app/res/drawable/ic_launcher.png
new file mode 100644
index 0000000..96a442e
--- /dev/null
+++ b/tzdata/update_test_app/res/drawable/ic_launcher.png
diff --git a/tzdata/update_test_app/res/layout/activity_main.xml b/tzdata/update_test_app/res/layout/activity_main.xml
new file mode 100644
index 0000000..b265837
--- /dev/null
+++ b/tzdata/update_test_app/res/layout/activity_main.xml
@@ -0,0 +1,106 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context=".MainActivity">
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/action"
+            android:id="@+id/action_label" />
+
+        <EditText
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:id="@+id/action"
+            android:layout_weight="1"
+            android:text="@string/default_action" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/version"
+            android:id="@+id/version_label" />
+
+        <EditText
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:id="@+id/version"
+            android:layout_weight="1"
+            android:text="@string/default_version" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/content_path"
+            android:id="@+id/content_path_label" />
+
+        <EditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/default_content_path"
+            android:id="@+id/content_path" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/required_hash"
+            android:id="@+id/required_hash_label" />
+
+        <EditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/default_required_hash"
+            android:id="@+id/required_hash" />
+
+    </LinearLayout>
+
+    <Button
+        android:id="@+id/trigger_install_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerHorizontal="true"
+        android:layout_centerVertical="true"
+        android:text="@string/trigger_install" />
+
+    <ScrollView
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:scrollbars="vertical"
+            android:fillViewport="true">
+
+        <TextView
+                android:layout_width="fill_parent"
+                android:layout_height="fill_parent"
+                android:id="@+id/log"
+                android:singleLine="false" />
+
+    </ScrollView>
+
+</LinearLayout>
diff --git a/tzdata/update_test_app/res/values/strings.xml b/tzdata/update_test_app/res/values/strings.xml
new file mode 100644
index 0000000..524f9d8
--- /dev/null
+++ b/tzdata/update_test_app/res/values/strings.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">InstallUpdateTestApp</string>
+    <string name="action">Action</string>
+    <string name="content_path">Content Path</string>
+    <string name="default_action">android.intent.action.UPDATE_TZDATA</string>
+    <string name="default_content_path">/data/local/tmp/out.zip</string>
+    <string name="default_required_hash">NONE</string>
+    <string name="default_version">1</string>
+    <string name="required_hash">Required Hash</string>
+    <string name="trigger_install">Trigger Install</string>
+    <string name="version">Version</string>
+</resources>
diff --git a/tzdata/update_test_app/res/xml/filepaths.xml b/tzdata/update_test_app/res/xml/filepaths.xml
new file mode 100644
index 0000000..c95b8f4
--- /dev/null
+++ b/tzdata/update_test_app/res/xml/filepaths.xml
@@ -0,0 +1,4 @@
+<!-- Used by FileProvider. See AndroidManifest.xml -->
+<paths>
+    <files-path path="temp/" name="temp" />
+</paths>