Enable STL in system/keymaster. am: c0f1efe6f9 am: 7c267e4c5e am: a1eaecd37e

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1674706

Change-Id: I811befa5ec07a075d8eb14331aa0825c94eea81b