Update clock position

Take into account the descent of the font.
For numeral fonts that support languages such as
Burmese, this space can be significant.

Test: atest KeyguardClockSwitchControllerTest
Test: manual
Fixes: 220158349
Change-Id: I778d9988e78ddde89a245f0383954ec9203bc185

packages/SystemUI/src/com/android/keyguard/AnimatableClockController.java

@@ -163,6 +163,18 @@ public class AnimatableClockController extends ViewController<AnimatableClockVie
         mStatusBarStateController.removeCallback(mStatusBarStateListener);
     }
 
+    /**
+     * @return the number of pixels below the baseline. For fonts that support languages such as
+     * Burmese, this space can be significant.
+     */
+    public float getBottom() {
+        if (mView.getPaint() != null && mView.getPaint().getFontMetrics() != null) {
+            return mView.getPaint().getFontMetrics().bottom;
+        }
+
+        return 0f;
+    }
+
     /** Animate the clock appearance */
     public void animateAppear() {
         if (!mIsDozing) mView.animateAppearOnLockscreen();

packages/SystemUI/src/com/android/keyguard/KeyguardClockSwitchController.java

@@ -292,8 +292,8 @@ public class KeyguardClockSwitchController extends ViewController<KeyguardClockS
 
     private void updateClockLayout() {
         int largeClockTopMargin = getContext().getResources().getDimensionPixelSize(
-                R.dimen.keyguard_large_clock_top_margin);
-
+                R.dimen.keyguard_large_clock_top_margin)
+                - (int) mLargeClockViewController.getBottom();
         RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(MATCH_PARENT,
                 MATCH_PARENT);
         lp.topMargin = largeClockTopMargin;