Fix the conflict of input and output manifest files

testing/android/native_test_apk.xml

Index: testing/android/native_test_apk.xml
diff --git a/testing/android/native_test_apk.xml b/testing/android/native_test_apk.xml
index 03e565f4e23bc6e7e41273c54f746e7cfa5a6401..8fd05bb67eb6c090ca8e7495cdf8fe7a94774839 100644
--- a/testing/android/native_test_apk.xml
+++ b/testing/android/native_test_apk.xml
@@ -66,6 +66,13 @@ found in the LICENSE file.
   </condition>
   <property name="native.libs.absolute.dir" location="${out.dir}/libs" />
 
+  <!-- Copy the below manifest file to a new directory because the project
+       base directory and output directory are the same and manifest merge
+       task takes the same file as source and target when doing copying.
+       Otherwise it'll generate an empty manifest file. -->
+  <copy file="AndroidManifest.xml" todir="${out.dir}/manifest"/>
+  <property name="manifest.abs.file" location="${out.dir}/manifest/AndroidManifest.xml"/>
+
   <target name="-post-compile">
     <!-- copy gdbserver to main libs directory if building debug. -->
     <if>