Upgrade mobly to 161ff47b51c5fa836bf7a14fbdc69587682018b3 am: 51b0b7394a am: 0200298ea2

Original change: https://android-review.googlesource.com/c/platform/external/python/mobly/+/3031248

Change-Id: I2369c9e73ccbcfcc4c5f8c2d137f9789d93138d3
Signed-off-by: Automerger Merge Worker <[email protected]>