Disable flaking AudioSourceTest#canReceiveSilence

Bug: 273534749
Change-Id: Iaa04414ab990d8a622f19accd8ac4b279a8383fd
Test: None

diff --git a/camera/camera-video/src/test/java/androidx/camera/video/internal/audio/AudioSourceTest.kt b/camera/camera-video/src/test/java/androidx/camera/video/internal/audio/AudioSourceTest.kt
index 72e1075..7f59988 100644
--- a/camera/camera-video/src/test/java/androidx/camera/video/internal/audio/AudioSourceTest.kt
+++ b/camera/camera-video/src/test/java/androidx/camera/video/internal/audio/AudioSourceTest.kt

@@ -33,6 +33,7 @@
 import java.util.concurrent.Executor
 import java.util.concurrent.TimeUnit.NANOSECONDS
 import org.junit.After
+import org.junit.Ignore
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.RobolectricTestRunner
@@ -198,6 +199,7 @@
         audioStream.verifyStopCall(CallTimes(1), COMMON_TIMEOUT_MS)
     }
 
+    @Ignore // b/273534749
     @Test
     fun canReceiveSilence() {
         // Arrange.