libbinder_ndk: rename things according to convention

C++ wrapper namespace 'android' -> 'ndk'
AutoAIBinder -> SpAIBinder (to reflect usage, disambiguate with auto_ptr)
AutoA* -> ScopedA (to reflect usage, disambiguate with auto_ptr

Bug: 112664205
Test: atest android.binder.cts
Change-Id: I84b22572cd9ffcd4e6107337b83290f35d3ad4a7
3 files changed