Add Concurrent Multi-Session IME test apk

This test apk will host the concurrent multi-session IME tests.
For now, it will be enabled for Android Auto only.

Bug: 304358981
Test: atest ConcurrentMultiSessionImeTest
Change-Id: I437acbd1ce72868292add242fc38aeff9a548add
diff --git a/tests/inputmethod/ConcurrentMultiSessionImeTest/Android.bp b/tests/inputmethod/ConcurrentMultiSessionImeTest/Android.bp
new file mode 100644
index 0000000..afaa3f0
--- /dev/null
+++ b/tests/inputmethod/ConcurrentMultiSessionImeTest/Android.bp
@@ -0,0 +1,36 @@
+// Copyright (C) 2023 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.
+
+package {
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+android_test {
+    name: "ConcurrentMultiSessionImeTest",
+    srcs: ["src/**/*.java"],
+    libs: ["android.test.runner"],
+    static_libs: [
+        "androidx.test.ext.junit",
+        "platform-test-annotations",
+        "platform-test-rules",
+        "truth",
+    ],
+    test_suites: [
+        "general-tests",
+    ],
+    sdk_version: "current",
+
+    // Store test artifacts in separated directories for easier debugging.
+    per_testcase_directory: true,
+}