WebRTC: Remove android_apk recipe

scripts/slave/recipes/webrtc/chromium.expected/chromium_webrtc_Win7_Tester.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]\\scripts\\slave\\kill_processes.py"
     ],
     "name": "taskkill"
   },
   {
@@ skipping 89 matching lines @@
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]\\scripts\\slave\\extract_build.py",
       "--target",
       "Release",
       "--build-url",
       "gs://chromium-webrtc/Win Builder",
       "--build_revision",
-      "170242",
+      "321321",
       "--factory-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"Win7 Tester\", \"buildnumber\": 571, \"mastername\": \"chromium.webrtc\", \"parent_buildername\": \"Win Builder\", \"parent_got_revision\": \"321321\", \"recipe\": \"webrtc/chromium\", \"revision\": \"321321\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"Win7 Tester\", \"buildnumber\": 571, \"mastername\": \"chromium.webrtc\", \"parent_buildername\": \"Win Builder\", \"parent_got_revision\": \"321321\", \"recipe\": \"webrtc/chromium\", \"revision\": \"321321\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}"
     ],
     "name": "extract build"
   },
   {
     "cmd": [
       "python",
@@ skipping 98 matching lines @@
     "cmd": [
       "python",
       "-u",
       "[BUILD]\\scripts\\slave\\process_dumps.py",
       "--target",
       "Release"
     ],
     "name": "process_dumps"
   }
 ]