Android: fixes SDK version checking when provisioning devices.

The system_properties is a string.

BUG=348992

Review URL: https://codereview.chromium.org/184343004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255062 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255062
Mojo: Enable EmbedderTest on Windows.

R=yzshen@chromium.org

Review URL: https://codereview.chromium.org/177353014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255063 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255063