Revert of [Android] Refactor the native test wrappers.

testing/android/native_test/native_test_jni_onload.cc

Index: testing/android/native_test/native_test_jni_onload.cc
diff --git a/testing/android/native_test/native_test_jni_onload.cc b/testing/android/native_test/native_test_jni_onload.cc
index 8fecc444c0ecd306abadfbc323ba02c80aea3269..041aa7430ef34de5a377c68993c0e9e0f42a4681 100644
--- a/testing/android/native_test/native_test_jni_onload.cc
+++ b/testing/android/native_test/native_test_jni_onload.cc
@@ -10,11 +10,11 @@
 namespace {
 
 bool RegisterJNI(JNIEnv* env) {
-  return testing::android::RegisterNativeTestJNI(env);
+  return RegisterNativeTestJNI(env);
 }
 
 bool Init() {
-  testing::android::InstallHandlers();
+  InstallHandlers();
   return true;
 }