Add strings and placeholder menu items for Android Chromoting help

This updates the verify_resources.py tool to exempt Android strings
from the "resource in use" check.

BUG=333129,270362

Review URL: https://codereview.chromium.org/168283008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252684 0039d316-1c4b-4281-b951-d872f2087c98
Less strict CHECK for DeviceCapabilities results.
We should crash only if returned result is bigger that buffer we provided.

BUG=345605
NOTRY=true

Review URL: https://codereview.chromium.org/175603002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252685 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252684
Make ApplicationLifetime support multiple observers

BUG=341231

Review URL: https://codereview.chromium.org/165373003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252686 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252686