Re-increase the Extensions API version change

To make the dependent features available in T_QPR2.

Fix: 248644827
Test: N/A
Change-Id: Iec064ca8ca4e90ce5620e1b5fb9ab18c1b7d5ad8

libs/WindowManager/Jetpack/src/androidx/window/extensions/WindowExtensionsImpl.java

@@ -41,7 +41,7 @@ public class WindowExtensionsImpl implements WindowExtensions {
     // TODO(b/241126279) Introduce constants to better version functionality
     @Override
     public int getVendorApiLevel() {
-        return 1;
+        return 2;
     }
 
     /**