Add plumbing for mouse-wheel support in Android Chromoting client

This will allow the TouchInputHandler code to inject mouse-wheel
events.

Review URL: https://codereview.chromium.org/80033003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237159 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237159
Change LOG(INFO) to VLOG(1) in google_api_keys.

These info messages generate a lot of log spam in unit tests.

BUG=322805

Review URL: https://codereview.chromium.org/83273009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237160 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237160