[automerger skipped] An enum is initialized as zero if it doesn't have default value am: f2e752316b -s ours am: 75338d49a0 -s ours am: e30d728f17 -s ours

am skip reason: Merged-In I6cb67258cc4aacc41ae80c46ccee10a3cfe723f6 with SHA-1 8042991b16 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/tools/aidl/+/15905949

Change-Id: I266323f52e960f124f8ec32f3a1cc056a61e5298