Move <uses-sdk /> to a differnt XML

Basically Android Studio does want targetSdkVersion to be specified in
build.gradle rather than AndroidManifest.xml.  To make both make build
and Android Studio build happy, this CL splits <uses-sdk /> from the
main AndroidManifest.xml to a different file and let them merged in
make build.

There should be no behavior change.

Bug: 110741422
Test: Manually verified that there is no difference in
      AndroidManifest.xml in the APK.
Change-Id: Ib673bca5a31b2f95329c9310a127ec0701bd8fdc
diff --git a/java/AndroidManifest_SdkVersion.xml b/java/AndroidManifest_SdkVersion.xml
new file mode 100644
index 0000000..3dfeede
--- /dev/null
+++ b/java/AndroidManifest_SdkVersion.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2018 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        package="com.android.inputmethod.latin">
+    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="23" />
+</manifest>