le_audio: Activate ASEs only configured for active context

Patch activates only ASEs which are configured for active context type.

Test: atest bluetooth_le_audio_client_test
Sponsor: @jpawlowski
Bug: 230436818
Change-Id: I2c8729cc4a5fe8e457c67dd0aab8d39a50aa6cc7
Merged-In: I2c8729cc4a5fe8e457c67dd0aab8d39a50aa6cc7
(cherry picked from commit 3657eef5)