audio: Inform audio HAL if it is a voice call initiated by Telephony

setMode() API with IN_CALL mode can be called by any of the Apps.
In HAL, it is required to distinguish if it is a real voice call
or not. Inform to audio HAL if it is a voice call by checking
getPhonestate() updated by telephony.

CRs-Fixed: 662804
Change-Id: I20a661f49f6566bdd1e23d6de18b509e2728ef19

media/java/android/media/AudioService.java

@@ -463,6 +463,8 @@ public void onError(int error) {
 
     private PowerManager.WakeLock mAudioEventWakeLock;
 
+    private TelephonyManager mTelephonyManager;
+
     private final MediaFocusControl mMediaFocusControl;
 
     // Reference to BluetoothA2dp to query for AbsoluteVolume.
@@ -488,7 +490,6 @@ public AudioService(Context context) {
 
         PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
         mAudioEventWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "handleAudioEvent");
-
         Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
         mHasVibrator = vibrator == null ? false : vibrator.hasVibrator();
 
@@ -501,6 +502,9 @@ public AudioService(Context context) {
                 com.android.internal.R.integer.config_soundEffectVolumeDb);
 
         mVolumePanel = new VolumePanel(context, this);
+
+        mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+
         mForcedUseForComm = AudioSystem.FORCE_NONE;
 
         createAudioSystemThread();
@@ -1651,6 +1655,11 @@ public void setMode(int mode, IBinder cb) {
             if (mode == AudioSystem.MODE_CURRENT) {
                 mode = mMode;
             }
+
+            if ((mode == AudioSystem.MODE_IN_CALL) &&
+                (mTelephonyManager.getCallState() != TelephonyManager.CALL_STATE_IDLE)) {
+                 AudioSystem.setParameters("in_call=true");
+            }
             newModeOwnerPid = setModeInt(mode, cb, Binder.getCallingPid());
         }
         // when entering RINGTONE, IN_CALL or IN_COMMUNICATION mode, clear all