Disable screenshot tests in master (1/2)

This CL disables SystemUI screenshot tests in master given that the
golden images are generated from the tm-qpr-dev branch which can be
different from the master branch in term of how text, etc are rendered.
Given that all of SystemUI is working in tm-qpr-dev, we can have the
screenshot tests only there.

Bug: 241721843
Test: Manual
Change-Id: Ie7afe9fe7e05742b9ac485371cfdf97dbe511146
diff --git a/packages/SystemUI/TEST_MAPPING b/packages/SystemUI/TEST_MAPPING
index 26feaf9..234ef24 100644
--- a/packages/SystemUI/TEST_MAPPING
+++ b/packages/SystemUI/TEST_MAPPING
@@ -52,17 +52,6 @@
       ]
     },
     {
-      "name": "SystemUIGoogleScreenshotTests",
-      "options": [
-        {
-          "exclude-annotation": "org.junit.Ignore"
-        },
-        {
-          "exclude-annotation": "androidx.test.filters.FlakyTest"
-        }
-      ]
-    },
-    {
       // Permission indicators
       "name": "CtsPermission4TestCases",
       "options": [