LeAudioService: Make device inactive on "no available contexts"

When remote says there is no available context types, we should make
device Inactive.
Note: When becoming Inactive audio is stopped.

When such device will get available context back again, it will become
active

Bug: 314677565
Test: atest LeAudioServiceTest
Test: manual tests with many platforms on upf73
Flag: Exempt, trivial fix, regression tests manually and with unit tests
Change-Id: I41858df907e1282db00e476dd499f4020b14aa02