Push OverlayDeviceTests onto /system

Since OverlayDeviceTests needs to use the OverlayManager API directly,
push the test APk onto the system image and reboot the device before
running tests.

Bug: 119916381
Test: atest OverlayDeviceTests
Change-Id: I8f54e1532902b984e32da68ed8aa32bf6c5b9272

core/tests/overlaytests/device/Android.bp

@@ -16,7 +16,11 @@ android_test {
     name: "OverlayDeviceTests",
     srcs: ["src/**/*.java"],
     platform_apis: true,
-    static_libs: ["androidx.test.rules"],
+    certificate: "platform",
+    static_libs: [
+        "androidx.test.rules",
+        "testng",
+    ],
     test_suites: ["device-tests"],
     data: [
         ":OverlayDeviceTests_AppOverlayOne",

core/tests/overlaytests/device/AndroidManifest.xml

@@ -19,6 +19,8 @@
 
     <uses-sdk android:minSdkVersion="21" />
 
+    <uses-permission android:name="android.permission.CHANGE_OVERLAY_PACKAGES" />
+
     <application>
         <uses-library android:name="android.test.runner"/>
     </application>

core/tests/overlaytests/device/AndroidTest.xml

@@ -19,9 +19,20 @@
     <option name="test-suite-tag" value="apct" />
     <option name="test-suite-tag" value="apct-instrumentation" />
 
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="cleanup" value="true" />
+        <option name="remount-system" value="true" />
+        <option name="push" value="OverlayDeviceTests.apk->/system/app/OverlayDeviceTests.apk" />
+    </target_preparer>
+  
+    <!-- Reboot to have the test APK scanned by PM and reboot after to remove the test APK. -->
+    <target_preparer class="com.android.tradefed.targetprep.RebootTargetPreparer">
+      <option name="pre-reboot" value="true" />
+      <option name="post-reboot" value="true" />
+    </target_preparer>
+
     <target_preparer class="com.android.tradefed.targetprep.TestAppInstallSetup">
         <option name="cleanup-apks" value="true" />
-        <option name="test-file-name" value="OverlayDeviceTests.apk" />
         <option name="test-file-name" value="OverlayDeviceTests_AppOverlayOne.apk" />
         <option name="test-file-name" value="OverlayDeviceTests_AppOverlayTwo.apk" />
         <option name="test-file-name" value="OverlayDeviceTests_FrameworkOverlay.apk" />

core/tests/overlaytests/device/test-apps/AppOverlayOne/Android.bp

@@ -15,6 +15,6 @@
 android_test {
     name: "OverlayDeviceTests_AppOverlayOne",
     sdk_version: "current",
-
+    certificate: "platform",
     aaptflags: ["--no-resource-removal"],
 }

core/tests/overlaytests/device/test-apps/AppOverlayTwo/Android.bp

@@ -15,6 +15,6 @@
 android_test {
     name: "OverlayDeviceTests_AppOverlayTwo",
     sdk_version: "current",
-
+    certificate: "platform",
     aaptflags: ["--no-resource-removal"],
 }