Revert "Revert r147259 "Add android trybot slaves""
Revert "Revert r147259 "Add android trybot slaves""

Change was committed prematurely and reverted.  This will
add it when we're ready to restart tryserver.

Original review:
https://chromiumcodereview.appspot.com/10780034/


BUG=
TEST=


Review URL: https://chromiumcodereview.appspot.com/10796015

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@147423 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build