Enable NativeActivity based Android tests.

testing/android/native_test/BUILD.gn

Index: testing/android/native_test/BUILD.gn
diff --git a/testing/android/native_test/BUILD.gn b/testing/android/native_test/BUILD.gn
index 8ea6683fc74f5802372e574eaa3304159f7e8028..19f2363d238c73c035df8165b1e6851a29afa0fe 100644
--- a/testing/android/native_test/BUILD.gn
+++ b/testing/android/native_test/BUILD.gn
@@ -46,9 +46,11 @@ android_library("native_test_java") {
   srcjar_deps = [ "//base:base_native_libraries_gen" ]
   java_files = [
     "java/src/org/chromium/native_test/NativeBrowserTestActivity.java",
-    "java/src/org/chromium/native_test/NativeTestActivity.java",
+    "java/src/org/chromium/native_test/NativeTest.java",
     "java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java",
+    "java/src/org/chromium/native_test/NativeUnitTest.java",
     "java/src/org/chromium/native_test/NativeUnitTestActivity.java",
+    "java/src/org/chromium/native_test/NativeUnitTestNativeActivity.java",
   ]
   jar_excluded_patterns = [ "*/NativeLibraries.class" ]
 }
@@ -56,7 +58,7 @@ android_library("native_test_java") {
 # GYP: //testing/android/native_test.gyp:native_test_jni_headers
 generate_jni("native_test_jni_headers") {
   sources = [
-    "java/src/org/chromium/native_test/NativeTestActivity.java",
+    "java/src/org/chromium/native_test/NativeTest.java",
   ]
   jni_package = "testing"
 }