Fixing Y translation of media when no media is visible in previousLocation

Fixes: 271247142
Test: have media playing -> go to lockscreen in split shade -> remove media player -> swipe down to shade and see clock not jumping
Change-Id: I7e7e682a5c70adc9e3a6d08ccbc0b8f78d43a775

packages/SystemUI/src/com/android/systemui/media/controls/ui/MediaHierarchyManager.kt

@@ -317,13 +317,16 @@ constructor(
 
     /**
      * Returns the amount of translationY of the media container, during the current guided
-     * transformation, if running. If there is no guided transformation running, it will return 0.
+     * transformation, if running. If there is no guided transformation running, it will return -1.
      */
     fun getGuidedTransformationTranslationY(): Int {
         if (!isCurrentlyInGuidedTransformation()) {
             return -1
         }
-        val startHost = getHost(previousLocation) ?: return 0
+        val startHost = getHost(previousLocation)
+        if (startHost == null || !startHost.visible) {
+            return 0
+        }
         return targetBounds.top - startHost.currentBounds.top
     }
 

packages/SystemUI/tests/src/com/android/systemui/media/controls/ui/MediaHierarchyManagerTest.kt

@@ -388,6 +388,15 @@ class MediaHierarchyManagerTest : SysuiTestCase() {
             .isEqualTo(expectedTranslation)
     }
 
+    @Test
+    fun getGuidedTransformationTranslationY_previousHostInvisible_returnsZero() {
+        goToLockscreen()
+        enterGuidedTransformation()
+        whenever(lockHost.visible).thenReturn(false)
+
+        assertThat(mediaHierarchyManager.getGuidedTransformationTranslationY()).isEqualTo(0)
+    }
+
     @Test
     fun isCurrentlyInGuidedTransformation_hostsVisible_returnsTrue() {
         goToLockscreen()