Add stubs for renamed libnativehelper NDK API methods

The renames will be:
- AFileDescriptor_getFD to AFileDescriptor_getFd
- AFileDescriptor_setFD to AFileDescriptor_setFd

This CL adds the new symbols, the old symbols will be retired in a
follow-up.

Bug: 185256332
Test: TH
Change-Id: Ifc0cf49bd699e4ab19f32ffd3c5594601979c8ea
2 files changed