Exclude flaky annoatated tests

Folks seems to be using both androidx.test.filters.FlakyTest as well as
android.platform.test.annotations.FlakyTest to ignore flake tests. While
it's better that there is a more standardized doc for exlcusion, a
strong blocking  test mapping suite should exclude both.

Test: N/A
Bug: 259525599
Change-Id: Ie5cdce3ed3f5c5cea169a36189163ba530c66364

packages/SystemUI/TEST_MAPPING

@@ -16,6 +16,9 @@
         },
         {
             "exclude-annotation": "android.platform.test.annotations.Postsubmit"
+        },
+        {
+            "exclude-annotation": "android.platform.test.annotations.FlakyTest"
         }
       ]
     }
@@ -72,16 +75,16 @@
   // Curious where your @Scenario tests will run?
   //
   // @Ignore: nowhere
-  // @Staging or @FlakyTest: in staged-postsubmit, but not postsubmit or
-  // 	presubmit
+  // @FlakyTest: in staged-postsubmit, but not blocking postsubmit or
+  // presubmit
   // @Postsubmit: in postsubmit and staged-postsubmit, but not presubmit
   // none of the above: in presubmit, postsubmit, and staged-postsubmit
   //
-  // Therefore, please annotate new tests with @Staging, then with @Postsubmit
-  // once they're ready for postsubmit, then with neither once they're ready
-  // for presubmit.
+  // Ideally, please annotate new tests with @FlakyTest, then with @Postsubmit
+  // once they're ready for postsubmit as they will immediately block go/android-platinum,
+  // then with neither once they're ready for presubmit.
   //
-  // If you don't use @Staging or @Postsubmit, your new test will immediately
+  // If you don't use @Postsubmit, your new test will immediately
   // block presubmit, which is probably not what you want!
   "sysui-platinum-postsubmit": [
     {
@@ -98,6 +101,9 @@
         },
         {
             "exclude-annotation": "androidx.test.filters.FlakyTest"
+        },
+        {
+            "exclude-annotation": "android.platform.test.annotations.FlakyTest"
         }
       ]
     }
@@ -130,6 +136,9 @@
         },
         {
             "include-filter": "android.platform.test.scenario.sysui"
+        },
+        {
+            "exclude-annotation": "android.platform.test.annotations.FlakyTest"
         }
       ]
     }