Proguard conditional keeps for layouts

Added flag for aapt2 link to generate proguard conditional keep rules.

Bug: 682786
Change-Id: I11e7afd5b540bcc6bc0f4bf54a8bd20c750fb0a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1723796
Commit-Queue: Harsh Patel <harshpa@google.com>
Reviewed-by: Sam Maier <smaier@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#684463}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 58305bfdd42a37595b26cde39585309d2a7fb85f
1 file changed