[automerge] Add JavaDerive toString to AIDL classes 2p: da10904e96 2p: 83e5c2cdc1

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/17245349

Bug: 223230764
Change-Id: Ic17b2e1549e8d6aae5ca8aaade2cc82451e00133