Rename org.chromium.chrome.testshell to org.chromium.chrome.shell
Move res/ directory to chrome/android/shell/res/

BUG=348137
TBR=pfeldman,craigdh

Review URL: https://codereview.chromium.org/184493006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254705 0039d316-1c4b-4281-b951-d872f2087c98