Passing useLiveliness flag to FUL in startUi call

Because of changes in support of multi-user functionaity, the FUL
'eye blink' checkbox was no longer enabling liveliness detection.

It no longer makes sense to check the biometric flags (such as the
liveliness flag) inside of the Face Unlock service.  Instead, that
flag is now passed in from lockscreen via the aidl interface when
startUi is called.

Change-Id: I591cf1924fbb24da7d54b94ef29824e5197d3b20

Author: Brian Colonna

core/java/com/android/internal/policy/IFaceLockInterface.aidl

@@ -20,7 +20,8 @@ import com.android.internal.policy.IFaceLockCallback;
 
 /** {@hide} */
 interface IFaceLockInterface {
-    void startUi(IBinder containingWindowToken, int x, int y, int width, int height);
+    void startUi(IBinder containingWindowToken, int x, int y, int width, int height,
+            boolean useLiveliness);
     void stopUi();
     void registerCallback(IFaceLockCallback cb);
     void unregisterCallback(IFaceLockCallback cb);

policy/src/com/android/internal/policy/impl/FaceUnlock.java

@@ -291,7 +291,8 @@ public void start(IBinder windowToken, int x, int y, int w, int h) {
                 if (!mServiceRunning) {
                     if (DEBUG) Log.d(TAG, "Starting FaceLock");
                     try {
-                        mService.startUi(windowToken, x, y, w, h);
+                        mService.startUi(windowToken, x, y, w, h,
+                                mLockPatternUtils.isBiometricWeakLivelinessEnabled());
                     } catch (RemoteException e) {
                         Log.e(TAG, "Caught exception starting FaceLock: " + e.toString());
                         return;