android: run zip/extract/compile steps in the parent of src/, like on other platforms.

BUG=294387
R=ilevy@chromium.org

Review URL: https://codereview.chromium.org/32323005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229993 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229993