AOSP/Messaging - Moved LOCAL_COMPATIBILITY_SUITE to tests/Android.mk.
+ Deleted the unnecessary blankId check. Updated the TODO comment for NUM_TEST_CONVERSATIONS+4.
+ Added AndroidTest.xml
+ Added "LOCAL_PROGUARD_ENABLED := disabled" for tests to pass on cf.

Bug: 126516784

Test: make messagingtests and tested the messaging UI manually. Ran the following CTS tests on Pixel phone.

$ make -j 40
  -rw-r--r-- 1 rtenneti primarygroup 8529760 Mar  8 16:46 out/target/product/marlin/system/app/messaging/messaging.apk

$ make messagingtests -j
  -rw-r--r-- 1 rtenneti primarygroup 729713 Mar 13 14:22 out/target/product/marlin/testcases/messagingtests/messagingtests.apk

$ adb install -r -d out/target/product/marlin/system/app/messaging/messaging.apk
$ adb install -r -d out/target/product/marlin/testcases/messagingtests/messagingtests.apk

atest
-----
$ cd .../packages/apps/Messaging
$ atest
  ...
  Results from tests that require device:

  Summary
  -------
  messagingtests: Passed: 113, Failed: 0, Ignored: 0

  All tests passed!

acloud test
-----------
$ lunch aosp_cf_x86_phone-userdebug

$ make -j 40
  -rw-r--r-- 1 rtenneti primarygroup 10585182 Mar 15 15:19 ./target/product/vsoc_x86/system/app/messaging/messaging.apk
$ make messagingtests -j
  -rw-r--r-- 1 rtenneti primarygroup 643697 Mar 15 15:57 ./target/product/vsoc_x86/system/app/messagingtests/messagingtests.apk

$ acloud reconnect
$ adb devices
  List of devices attached
  127.0.0.1:52761	device

$ adb install -r -d out/target/product/vsoc_x86/system/app/messaging/messaging.apk
$ adb install -r -d out/target/product/vsoc_x86/system/app/messagingtests/messagingtests.apk

$ cd packages/apps/Messaging
$ atest messagingtests -- --abi x86 --serial 127.0.0.1:52761

Change-Id: I6b1143db6c596805f3c48f310323e0e02d344d00
diff --git a/tests/AndroidTest.xml b/tests/AndroidTest.xml
new file mode 100644
index 0000000..601bc8e
--- /dev/null
+++ b/tests/AndroidTest.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Runs Messaging Tests.">
+    <option name="test-suite-tag" value="apct" />
+    <option name="test-suite-tag" value="apct-instrumentation" />
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="messagingtests.apk" />
+        <option name="test-file-name" value="messaging.apk" />
+    </target_preparer>
+
+    <test class="com.android.tradefed.testtype.InstrumentationTest" >
+        <option name="package" value="com.android.messaging.test" />
+        <option name="runner" value="android.test.InstrumentationTestRunner" />
+    </test>
+</configuration>
+