Android Studio: Fix module generation for all

Accidentally reversed logic in last CL so that by default every
build.gradle file was generated. Consolidated logic in args.all.

Bug: 620034
Change-Id: I5efe128150f688296abb1f835b3cbe7eba58f3ae
Reviewed-on: https://chromium-review.googlesource.com/1048398
Commit-Queue: Eric Stevenson <estevenson@chromium.org>
Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556797}
1 file changed