[automerger skipped] Clarify NNAPI control flow shape constraints RESTRICT AUTOMERGE am: dfe15258 am: 22995317 -s ours

am skip reason: subject contains skip directive

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1351586

Change-Id: Ia3b9c4e35399cf398657867f39b617cacb3b3d2c