Cleanup KeyguardIndicationController on tearDown

In case messages come in on the handler after the KeyguardIndication
class is already gone which can cause NPEs.

Test: atest SystemUITests
Fixes: 222215310
Change-Id: Iafa5379b68994fecdea6540a20522da21af5c788

packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java

@@ -293,6 +293,14 @@ public class KeyguardIndicationController {
         }
     }
 
+    /**
+     * Cleanup
+     */
+    public void destroy() {
+        mHandler.removeCallbacksAndMessages(null);
+        mBroadcastDispatcher.unregisterReceiver(mBroadcastReceiver);
+    }
+
     private void handleAlignStateChanged(int alignState) {
         String alignmentIndication = "";
         if (alignState == DockManager.ALIGN_STATE_POOR) {

packages/SystemUI/tests/src/com/android/systemui/statusbar/KeyguardIndicationControllerTest.java

@@ -226,6 +226,10 @@ public class KeyguardIndicationControllerTest extends SysuiTestCase {
     @After
     public void tearDown() throws Exception {
         mTextView.setAnimationsEnabled(true);
+        if (mController != null) {
+            mController.destroy();
+            mController = null;
+        }
     }
 
     private void createController() {