Add isolate files for Android tests

BUG=chromium:583318
TESTED=Passing runs with:
GYP_DEFINES='test_isolation_mode=prepare OS=android' webrtc/build/gyp_webrtc
ninja -C out/Release
NOTRY=True
NOPRESUBMIT=True

Review URL: https://codereview.webrtc.org/1882963003

Cr-Commit-Position: refs/heads/master@{#12397}
diff --git a/webrtc/common_video/common_video_unittests.gyp b/webrtc/common_video/common_video_unittests.gyp
index 545bfa4..5fa082a 100644
--- a/webrtc/common_video/common_video_unittests.gyp
+++ b/webrtc/common_video/common_video_unittests.gyp
@@ -54,7 +54,28 @@
           ],
         },
       ],
-    }],
+      'conditions': [
+        ['test_isolation_mode != "noop"',
+          {
+            'targets': [
+              {
+                'target_name': 'common_video_unittests_apk_run',
+                'type': 'none',
+                'dependencies': [
+                  '<(apk_tests_path):common_video_unittests_apk',
+                ],
+                'includes': [
+                  '../build/isolate.gypi',
+                ],
+                'sources': [
+                  'common_video_unittests_apk.isolate',
+                ],
+              },
+            ],
+          },
+        ],
+      ],
+    }],  # OS=="android"
     ['test_isolation_mode != "noop"', {
       'targets': [
         {