BT: Broadcast AIDL simplification

* Extract broadcast as separate session type
* Remove the union from LeAudioConfiguration, but use it
  for unicast configuration only
* Simplify default implementations

Bug: 15067092
Test: make
Tag: #feature
Change-Id: Ib6c3ffb6396a71011abb03a374e58ce27fdf3f39
diff --git a/bluetooth/audio/aidl/default/BluetoothAudioProviderFactory.cpp b/bluetooth/audio/aidl/default/BluetoothAudioProviderFactory.cpp
index 1e55a0b..d709ab6 100644
--- a/bluetooth/audio/aidl/default/BluetoothAudioProviderFactory.cpp
+++ b/bluetooth/audio/aidl/default/BluetoothAudioProviderFactory.cpp
@@ -64,6 +64,12 @@
     case SessionType::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH:
       provider = ndk::SharedRefBase::make<LeAudioOffloadInputAudioProvider>();
       break;
+    case SessionType::LE_AUDIO_BROADCAST_SOFTWARE_ENCODING_DATAPATH:
+      provider = ndk::SharedRefBase::make<LeAudioSoftwareOutputAudioProvider>();
+      break;
+    case SessionType::LE_AUDIO_BROADCAST_HARDWARE_OFFLOAD_ENCODING_DATAPATH:
+      provider = ndk::SharedRefBase::make<LeAudioOffloadOutputAudioProvider>();
+      break;
     default:
       provider = nullptr;
       break;