android: Add playground for lint repros

Similar to `//third_party/r8/playground`, this allows us to create
minimal lint repros for bugs like b/343519613.

Bug: 343519613, 345229357
Change-Id: Ifaa1b0167b7bb03e74214726975d0efbbbfa9283
Fixed: 345229357
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5601551


Commit-Queue: Mohamed Heikal <mheikal@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Auto-Submit: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1310784}