Fix wrong integer type in AIDL bcradio utils lib

Bug: 310029333
Test: atest broadcastradio_utils_aidl_test
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:eadbce6c47a28f04203fe44576a75b48f471c671)
Merged-In: I929049c0991a557f518853ecebd5ba67973e4274
Change-Id: I929049c0991a557f518853ecebd5ba67973e4274
3 files changed