Add Opus to BT Audio HAL and update version to V2

This CL adds Opus as a supported A2DP codec to the BT Audio HAL and
updates HAL compatibility matrix.

Bug: 226441860
Test: A2DP sink device using bds-dev
Change-Id: I21249e3e7e76412af7ed62a3fc9ec133434cf963
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index bf27199..84263b6 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -142,6 +142,7 @@
     </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.bluetooth.audio</name>
+        <version>2</version>
         <interface>
             <name>IBluetoothAudioProviderFactory</name>
             <instance>default</instance>