[AWARE] Create true translations between legacy and hidl enums

Replace implicits translations between legacy and hidl enums (using
casts) with explicit translations.

(cherry-pick of commit 284511779ca6c425a4f701ca8098484d954e13c4)

Bug: 35767620
Test: integration (sl4a) tests
Merged-In: I4ae4cd691226ce29bc0e92f9890fbb343a064505
Change-Id: I4ae4cd691226ce29bc0e92f9890fbb343a064505
1 file changed