Add TEST_MAPPING for gating and logging

The tests included are unit tests for the implementation (under
FrameworksServicesTests), for the corresponding TestRule
(PlatformCompatGating) and CTS tests.

Bug: 137821288
Test: cd frameworks/base/core/java/android/app/compat && atest
Test: cd frameworks/base/services/core/java/com/android/server/compat \
          && atest
Change-Id: I1a652775715f1a9738cc72725303bc78dfa17d03

tests/PlatformCompatGating/Android.bp

@@ -18,6 +18,7 @@ android_test {
     name: "PlatformCompatGating",
     // Only compile source java files in this apk.
     srcs: ["src/**/*.java"],
+    test_suites: ["device-tests"],
     static_libs: [
         "junit",
         "androidx.test.runner",