[GWP-ASan] Add inbuilt options parser. am: 6c8a084dc2

Original change: https://android-review.googlesource.com/c/platform/external/gwp_asan/+/1580767

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ie53b2dc78aefd798d32100fc21354fbbf991c27f