Merge "Show a message when the test peripheral config is invalid." into sc-dev am: 2cded9ff1c am: 67fd4b3fef

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/15518293

Change-Id: I254b3762f0b21b8c83a0920973e8009aca56ac27