dumpapi dumps generic type parameters

dumpapi should dump generic type parameters as well.

Bug: 188713899
Test: aidl_unittests
Merged-In: I2d880dc095a91ef580caaa218f78775648992d5a
Change-Id: I2d880dc095a91ef580caaa218f78775648992d5a
(cherry picked from commit 71dfec349957d2db5af76576810b0ee325370e40)
2 files changed