libbinder_ndk: ScopedA -> ScopedAResource

The plan is to replace this type with std::unique_resource, but for
the time being, it should have a more appropriate name.

Bug: 112664205
Test: atest android.binder.cts
Change-Id: I8d18a3dc4bd76f1b383459fc778d647756d868b1
1 file changed