binder: Add enum_range<Enum>

Native backends of AIDL enum types support a template variable for
enumerating all values of the type.

Bug: 143992652
Test: system/tools/aidl/runtests.sh
      atest CtsNdkBinderTestCases

Change-Id: I3c3d24a6f24c4c02ac5c5b59bb0831c26f695dd2
2 files changed