Add APIs to support background call screening

Add Telecom APIs and AIDL code.

Test: CTS
Bug: 140317205
Change-Id: I99970f5ce12442f307a656db76cb26f5101e6c7f

telecomm/java/android/telecom/InCallAdapter.java

@@ -16,8 +16,8 @@
 
 package android.telecom;
 
-import android.net.Uri;
 import android.bluetooth.BluetoothDevice;
+import android.net.Uri;
 import android.os.Bundle;
 import android.os.RemoteException;
 
@@ -148,6 +148,26 @@ public final class InCallAdapter {
         }
     }
 
+    /**
+     * @see Call#enterBackgroundAudioProcessing()
+     */
+    public void enterBackgroundAudioProcessing(String callId) {
+        try {
+            mAdapter.enterBackgroundAudioProcessing(callId);
+        } catch (RemoteException e) {
+        }
+    }
+
+    /**
+     * @see Call#exitBackgroundAudioProcessing(boolean)
+     */
+    public void exitBackgroundAudioProcessing(String callId, boolean shouldRing) {
+        try {
+            mAdapter.exitBackgroundAudioProcessing(callId, shouldRing);
+        } catch (RemoteException e) {
+        }
+    }
+
     /**
      * Request audio routing to a specific bluetooth device. Calling this method may result in
      * the device routing audio to a different bluetooth device than the one specified. A list of