Initial commit of InputMethodStressTest.

This CL added a simple test of showing and hiding IME for 100 times.

TODOs:
1. Add more complicated flows (such as notification).
2. Check IME visibility in several points (WindowManager dump,
   SurfaceFlinger dump, etc), not just the inset that the app received.

Bug: 195468725
Test: atest InputMethodStressTest
Change-Id: I1959225a7396d17750d799e11c42eb1899fe5bb9
diff --git a/tests/InputMethodStressTest/AndroidTest.xml b/tests/InputMethodStressTest/AndroidTest.xml
new file mode 100644
index 0000000..b194010
--- /dev/null
+++ b/tests/InputMethodStressTest/AndroidTest.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 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="InputMethod integration/regression test">
+    <option name="test-suite-tag" value="apct" />
+
+    <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer" />
+
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="InputMethodStressTest.apk" />
+    </target_preparer>
+
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest">
+        <option name="package" value="com.android.inputmethod.stresstest" />
+    </test>
+</configuration>