Add 1.2 NN HAL: IPreparedModel & callbacks.

Create 1.2 version IPreparedModel, IPreparedModelCallback, and
IExecutionCallback.

Currently the new interfaces are created the same as 1.0 version,
but will have more methods introduced in later CLs.

Bug: 73506513
Test: VtsHalNeuralnetworksV1_xTargetTest with 1.2 sample driver
Change-Id: Icf4d04c22f88e825d87562f1489377fdf6bf585d
Merged-In: Icf4d04c22f88e825d87562f1489377fdf6bf585d
(cherry picked from commit b5cb8f76)