Make isInvisible ActivityEmbeddingSecondaryActivity check optional

We don't always have an in between frame with the ActivityEmbeddingSecondaryActivity being invisible once the main activity doesn't cover the entire screen.

Test: atest com.android.server.wm.flicker.activityembedding.OpenTrampolineActivityTest

Bug: 288591571
Change-Id: I9846ef34a7d9e007031c85545c58676b78dcb60d
diff --git a/tests/FlickerTests/src/com/android/server/wm/flicker/activityembedding/open/OpenTrampolineActivityTest.kt b/tests/FlickerTests/src/com/android/server/wm/flicker/activityembedding/open/OpenTrampolineActivityTest.kt
index aaf0158..6984762 100644
--- a/tests/FlickerTests/src/com/android/server/wm/flicker/activityembedding/open/OpenTrampolineActivityTest.kt
+++ b/tests/FlickerTests/src/com/android/server/wm/flicker/activityembedding/open/OpenTrampolineActivityTest.kt
@@ -14,18 +14,18 @@
  * limitations under the License.
  */
 
-package com.android.server.wm.flicker.activityembedding
+package com.android.server.wm.flicker.activityembedding.open
 
 import android.platform.test.annotations.FlakyTest
 import android.platform.test.annotations.Presubmit
 import android.tools.common.datatypes.Rect
 import android.tools.common.flicker.subject.region.RegionSubject
-import android.tools.common.traces.component.ComponentNameMatcher
 import android.tools.device.flicker.junit.FlickerParametersRunnerFactory
 import android.tools.device.flicker.legacy.FlickerBuilder
 import android.tools.device.flicker.legacy.LegacyFlickerTest
 import android.tools.device.flicker.legacy.LegacyFlickerTestFactory
 import androidx.test.filters.RequiresDevice
+import com.android.server.wm.flicker.activityembedding.ActivityEmbeddingTestBase
 import com.android.server.wm.flicker.helpers.ActivityEmbeddingAppHelper
 import org.junit.FixMethodOrder
 import org.junit.Test
@@ -173,7 +173,8 @@
                         .coversExactly(startDisplayBounds)
                 }
                 .then()
-                .isInvisible(ActivityEmbeddingAppHelper.SECONDARY_ACTIVITY_COMPONENT)
+                .isInvisible(ActivityEmbeddingAppHelper.SECONDARY_ACTIVITY_COMPONENT,
+                    isOptional = true)
                 .then()
                 .isVisible(ActivityEmbeddingAppHelper.SECONDARY_ACTIVITY_COMPONENT)
         }