[Ongoing Call Chip] Call Chronometer#stop to prevent leaks.

See
http://cs/android/frameworks/base/core/java/android/widget/Chronometer.java?l=241&rcl=fb11b7b3ffb2ad771d32a08a2c4238be197f13c5.

Test: Manual
Bug: 183229367
Fixes: 192243808
Change-Id: I7ea44b985d404184c99ca2a7afbf12e19f2bd5ed

packages/SystemUI/src/com/android/systemui/statusbar/phone/ongoingcall/OngoingCallController.kt

@@ -25,6 +25,7 @@ import android.content.Intent
 import android.util.Log
 import android.view.View
 import android.widget.Chronometer
+import androidx.annotation.VisibleForTesting
 import com.android.internal.jank.InteractionJankMonitor
 import com.android.systemui.R
 import com.android.systemui.animation.ActivityLaunchAnimator
@@ -122,6 +123,7 @@ class OngoingCallController @Inject constructor(
      * Should only be called from [CollapsedStatusBarFragment].
      */
     fun setChipView(chipView: View) {
+        tearDownChipView()
         this.chipView = chipView
         if (hasOngoingCall()) {
             updateChip()
@@ -165,8 +167,7 @@ class OngoingCallController @Inject constructor(
         val currentCallNotificationInfo = callNotificationInfo ?: return
 
         val currentChipView = chipView
-        val timeView =
-            currentChipView?.findViewById<Chronometer>(R.id.ongoing_call_chip_time)
+        val timeView = currentChipView?.getTimeView()
         val backgroundView =
             currentChipView?.findViewById<View>(R.id.ongoing_call_chip_background)
 
@@ -248,12 +249,19 @@ class OngoingCallController @Inject constructor(
 
     private fun removeChip() {
         callNotificationInfo = null
+        tearDownChipView()
         mListeners.forEach { l -> l.onOngoingCallStateChanged(animate = true) }
         if (uidObserver != null) {
             iActivityManager.unregisterUidObserver(uidObserver)
         }
     }
 
+    /** Tear down anything related to the chip view to prevent leaks. */
+    @VisibleForTesting
+    fun tearDownChipView() = chipView?.getTimeView()?.stop()
+
+    private fun View.getTimeView(): Chronometer? = this.findViewById(R.id.ongoing_call_chip_time)
+
     private data class CallNotificationInfo(
         val key: String,
         val callStartTime: Long,

packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/ongoingcall/OngoingCallControllerTest.kt

@@ -43,6 +43,7 @@ import com.android.systemui.util.concurrency.FakeExecutor
 import com.android.systemui.util.mockito.any
 import com.android.systemui.util.time.FakeSystemClock
 import com.google.common.truth.Truth.assertThat
+import org.junit.After
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -117,6 +118,11 @@ class OngoingCallControllerTest : SysuiTestCase() {
                 .thenReturn(PROC_STATE_INVISIBLE)
     }
 
+    @After
+    fun tearDown() {
+        controller.tearDownChipView()
+    }
+
     @Test
     fun onEntryUpdated_isOngoingCallNotif_listenerNotified() {
         notifCollectionListener.onEntryUpdated(createOngoingCallNotifEntry())