Make Chrome for Android dependent on Google Play Services

Various bits of Chrome for Android that are being upstreamed
(in particular Cast support) require Google Play Services.
This adds Google Play Services to the Android chrome_java

Note that this uses a variable so that one can use an
alternative version of Google Play Services. This is
required for Chrome for Android development.

Review URL:

Cr-Commit-Position: refs/heads/master@{#315538}
4 files changed