libyuv: Add Android Testers

scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_linux_memcheck.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "client.libyuv",
       "--builder",
       "Linux Memcheck",
@@ skipping 164 matching lines @@
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--no-xvfb",
       "--factory-properties",
-      "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux Memcheck\", \"mastername\": \"client.libyuv\", \"recipe\": \"libyuv/libyuv\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
+      "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux Memcheck\", \"buildnumber\": 1337, \"mastername\": \"client.libyuv\", \"recipe\": \"libyuv/libyuv\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--build-properties",
-      "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux Memcheck\", \"mastername\": \"client.libyuv\", \"recipe\": \"libyuv/libyuv\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
+      "{\"BUILD_CONFIG\": \"Release\", \"buildername\": \"Linux Memcheck\", \"buildnumber\": 1337, \"mastername\": \"client.libyuv\", \"recipe\": \"libyuv/libyuv\", \"revision\": \"12345\", \"slavename\": \"slavename\"}",
       "--step-name=libyuv_unittest",
       "--builder-name=Linux Memcheck",
       "--slave-name=slavename",
+      "--build-number=1337",
       "--pass-build-dir",
       "--pass-target",
       "--run-shell-script",
       "[SLAVE_BUILD]/src/tools/valgrind-libyuv/libyuv_tests.sh",
       "--test",
       "libyuv_unittest",
       "--tool",
       "memcheck"
     ],
     "name": "libyuv_unittest"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]