Merge "ueventd: Allow pattern matching to find external firmware handler" am: 4a3ab034c6 am: dd7da900a0 am: 1875508cdf

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1664121

Change-Id: I25b4c6abe1a3197264b271f01c8ecda14e795e6a