Parse broadcast offload capabilities

1. Parse the broadcast capability from capability file
2. Convert broadcast HAL format to stack format
3. Update test to validate broadcast capability parsing
4. Correct the map size before accessing in VTS test

Tag: #feature
Bug: 242472419
Test: atest BluetoothLeAudioCodecsProviderTest
Test: atest VtsHalBluetoothAudioTargetTest
Change-Id: I8ac88c1e9024ca03757620bf48eacdd60ada7eb4