Add container-like value_type alias to hidl_enum_range.

This allows instantiations like
::testing::ValuesIn(hidl_enum_range<Foo>()).

Test: make
Test: atest VtsHalDumpstateV1_1TargetTest
Change-Id: I1313a67c152ff830ca5ab9a7285b6e9fcb539444
1 file changed