Add functions to update on conference changes.

+ Add onConferenceChanged() to Connection, so that the Connection can
make act on changes to the conference.
+ Add a utility function to PhoneCapabilities to remove a capability
from a PhoneCapabilities bitmask. Figure this abstracts some bit
logic away to make things more readable.

Bug: 17429707
Change-Id: I0c97731a95dd6573488cd10f094a63abe2428bce

3 files changed, 18 insertions, 0 deletions

diff --git a/api/current.txt b/api/current.txt
index a9bcf74..f0cb3c8 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -28114,6 +28114,7 @@ package android.telecom {
     method public void onAbort();
     method public void onAnswer();
     method public void onAudioStateChanged(android.telecom.AudioState);
+    method public void onConferenceChanged();
     method public void onDisconnect();
     method public void onHold();
     method public void onPlayDtmfTone(char);
diff --git a/telecomm/java/android/telecom/Connection.java b/telecomm/java/android/telecom/Connection.java
index 51f193f..44fa157 100644
--- a/telecomm/java/android/telecom/Connection.java
+++ b/telecomm/java/android/telecom/Connection.java
@@ -911,6 +911,7 @@ public abstract class Connection {
             mConference = conference;
             if (mConnectionService != null && mConnectionService.containsConference(conference)) {
                 fireConferenceChanged();
+                onConferenceChanged();
             }
             return true;
         }
@@ -1009,6 +1010,11 @@ public abstract class Connection {
      */
     public void onPostDialContinue(boolean proceed) {}
 
+    /**
+     * Notifies this Connection that the conference which is set on it has changed.
+     */
+    public void onConferenceChanged() {}
+
     static String toLogSafePhoneNumber(String number) {
         // For unknown number, log empty string.
         if (number == null) {
diff --git a/telecomm/java/android/telecom/PhoneCapabilities.java b/telecomm/java/android/telecom/PhoneCapabilities.java
index c7d9014..9c67503 100644
--- a/telecomm/java/android/telecom/PhoneCapabilities.java
+++ b/telecomm/java/android/telecom/PhoneCapabilities.java
@@ -103,6 +103,17 @@ public final class PhoneCapabilities {
         return (capabilities & capability) != 0;
     }
 
+    /**
+     * Removes the specified capability from the set of capabilities and returns the new set.
+     * @param capabilities The set of capabilities.
+     * @param capability The capability to remove from the set.
+     * @return The set of capabilities, with the capability removed.
+     * @hide
+     */
+    public static int remove(int capabilities, int capability) {
+        return capabilities & ~capability;
+    }
+
     public static String toString(int capabilities) {
         StringBuilder builder = new StringBuilder();
         builder.append("[Capabilities:");