split android.hidl.memory

Split android.hidl.memory into android.hidl.memory and
android.hidl.allocator. This must be done because IAllocator is served
over hwbinder transport and IMapper/IMemory are always going to be
passthrough hals.

Test: hidl_test, device boots with allocator
Bug: 35327976

Merged-In: Ib135b5e101fadadbbf16126a98f90181f76a253b
Change-Id: Ib135b5e101fadadbbf16126a98f90181f76a253b
19 files changed