compat matrix: add ISap slot2

The framework supports this, but devices copied its support
into each of their compat matrices instead of adding it once
here.

Bug: 290408770
Test: build
Change-Id: I2de4f1365a6981a0a2ef7165c916fba91a340799
Merged-In: I2de4f1365a6981a0a2ef7165c916fba91a340799
diff --git a/compatibility_matrices/compatibility_matrix.8.xml b/compatibility_matrices/compatibility_matrix.8.xml
index 1c2cd50..b91d0f9 100644
--- a/compatibility_matrices/compatibility_matrix.8.xml
+++ b/compatibility_matrices/compatibility_matrix.8.xml
@@ -585,6 +585,7 @@
         <interface>
             <name>ISap</name>
             <instance>slot1</instance>
+            <instance>slot2</instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">