Non ABI changes to neuralnetworks HAL

NNAPI HAL comment strings were reformated due to
template changes for new versioning scheme.

Test: Image built
Bug: 177298018
Change-Id: I67b3a38c087edf6ba3c295f5ac43ca02b8359f6a
Merged-In: I67b3a38c087edf6ba3c295f5ac43ca02b8359f6a
(cherry picked from commit 87ff8d20)