Make wifi scan async. (don't auto-merge)

When an entity (NLP for example) acquires
a WifiLock and initiates a scan, scan can
get blocked until driver starts.

scan returns no useful info, scan results
are broadcast when obtained.

Bug: 2964633
Change-Id: Iaefc32bb6b82f0718285a18ac600e6bbbb096e77

2 files changed, 5 insertions, 3 deletions

diff --git a/wifi/java/android/net/wifi/IWifiManager.aidl b/wifi/java/android/net/wifi/IWifiManager.aidl
index 0ee559e..198b1e6 100644
--- a/wifi/java/android/net/wifi/IWifiManager.aidl
+++ b/wifi/java/android/net/wifi/IWifiManager.aidl
@@ -42,7 +42,7 @@ interface IWifiManager
 
     boolean pingSupplicant();
 
-    boolean startScan(boolean forceActive);
+    void startScan(boolean forceActive);
 
     List<ScanResult> getScanResults();
 
diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index dd162f2..f883588 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/wifi/java/android/net/wifi/WifiManager.java
@@ -570,7 +570,8 @@ public class WifiManager {
      */
     public boolean startScan() {
         try {
-            return mService.startScan(false);
+            mService.startScan(false);
+            return true;
         } catch (RemoteException e) {
             return false;
         }
@@ -588,7 +589,8 @@ public class WifiManager {
      */
     public boolean startScanActive() {
         try {
-            return mService.startScan(true);
+            mService.startScan(true);
+            return true;
         } catch (RemoteException e) {
             return false;
         }