Mark testNoResidualPermissionsOnUninstall as flaky

Test: Presubmit
Bug: 152721302
Change-Id: I3b3096ad0a1c2fee41fccff133b075508c5cb3a7
diff --git a/tests/tests/permission3/src/android/permission3/cts/PermissionTest23.kt b/tests/tests/permission3/src/android/permission3/cts/PermissionTest23.kt
index 851cad4..fd3b573 100644
--- a/tests/tests/permission3/src/android/permission3/cts/PermissionTest23.kt
+++ b/tests/tests/permission3/src/android/permission3/cts/PermissionTest23.kt
@@ -16,6 +16,7 @@
 
 package android.permission3.cts
 
+import androidx.test.filters.FlakyTest
 import org.junit.Before
 import org.junit.Test
 
@@ -229,6 +230,7 @@
     }
 
     @Test(timeout = 120000)
+    @FlakyTest
     fun testNoResidualPermissionsOnUninstall() {
         // Grant all permissions
         grantAppPermissions(