GRIT: Enable variable expansion in filenames during HTML inlining.

BUG=232048
R=flackr@chromium.org

Review URL: https://codereview.chromium.org/16539002

git-svn-id: http://grit-i18n.googlecode.com/svn/trunk@125 7262f16d-afe8-6277-6482-052fa10e57b1
Added initial support for android to the grit policy generators.

Some policies may be flagged as supported on the android platform;
this change makes the policy templates generators recognize but ignore
that platform, so that the policy resources can still be generated.

BUG=chromium:247641
R=pastarmovj@chromium.org

Review URL: https://codereview.chromium.org/16132009

git-svn-id: http://grit-i18n.googlecode.com/svn/trunk@126 7262f16d-afe8-6277-6482-052fa10e57b1