EARC: Add eARC AIDL files

AIDL files for eARC HAL.

Test: m android.hardware.tv.earc-update-api
      atest VtsHalTvEArcAidlTargetTest
Bug: 240388105
Change-Id: Id2a337b928e64e022d97b4339bf7788cc80ea653
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index c4a5d25..5150fb5 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -696,6 +696,13 @@
         </interface>
     </hal>
     <hal format="aidl" optional="true">
+        <name>android.hardware.tv.earc</name>
+        <interface>
+            <name>IEArc</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+    <hal format="aidl" optional="true">
         <name>android.hardware.tv.hdmi</name>
         <interface>
             <name>IHdmi</name>