android: Use raw strings for stack.py re.compile Bug: None Change-Id: I8d0f7ee2dc61e1f4a2c8dbf8b964d0e0eb530051 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6297553 Auto-Submit: Peter Wen <[email protected]> Commit-Queue: Mohamed Heikal <[email protected]> Commit-Queue: Peter Wen <[email protected]> Reviewed-by: Mohamed Heikal <[email protected]> Cr-Commit-Position: refs/heads/main@{#1424135} NOKEYCHECK=True GitOrigin-RevId: 5dc5396406c202ae8f7a9b60cf74f3c45672924c