Use proper HCI_ERR_* constants in advertisement termination handling

There is no functional change, just making the code pretty, and updating
names to match 5.0 specification.

Test: sl4a AdvertisingSetTest:test_reenabling
Bug: 74198564
Change-Id: I1811e19bd18470adda55f7af7cfee23bcc4d1871
(cherry picked from commit 8e6b9a9760efa5aba116355b4216610e75a54a49)