OMS: add TEST_MAPPING

The tests for the overlay manager are comprised of

  - FrameworksServicesTests (part of)
  - OverlayDeviceTests
  - OverlayHostTests
  - CtsAppSecurityHostTestCases (part of)

Add a TEST_MAPPING file to track all of the above.

Bug: 130257644
Test: atest --test-mapping $ANDROID_BUILD_TOP/frameworks/base/core/java/android/content/om/TEST_MAPPING
Change-Id: I401179709e000bf6b41af99d548be732b9a03a34

core/java/android/content/om/TEST_MAPPING

@@ -0,0 +1,26 @@
+{
+  "presubmit": [
+    {
+      "name": "FrameworksServicesTests",
+      "options": [
+        {
+          "include-filter": "com.android.server.om"
+        }
+      ]
+    },
+    {
+      "name": "OverlayDeviceTests"
+    },
+    {
+      "name": "OverlayHostTests"
+    },
+    {
+      "name": "CtsAppSecurityHostTestCases",
+      "options": [
+        {
+          "include-filter": "android.appsecurity.cts.OverlayHostTest"
+        }
+      ]
+    }
+  ]
+}