Merge "Clear and re-focus pin password entry field" into udc-dev am: e044f614e7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22229495

Change-Id: Ie1b62c1006625423c3541b45154cb0b3fe414aaa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

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

@@ -127,6 +127,11 @@ public abstract class KeyguardPinBasedInputViewController<T extends KeyguardPinB
     @Override
     public void onResume(int reason) {
         super.onResume(reason);
+        // It's possible to reach a state here where mPasswordEntry believes it is focused
+        // but it is not actually focused. This state will prevent the view from gaining focus,
+        // as requestFocus will no-op since the focus flag is already set. By clearing focus first,
+        // it's guaranteed that the view has focus.
+        mPasswordEntry.clearFocus();
         mPasswordEntry.requestFocus();
     }