spes: overlay: Disable alpha compositing in WM

Completely eliminates occasional jank in few animations

Signed-off-by: Parixshit <87859520+Parixshit@users.noreply.github.com>

overlay/frameworks/base/core/res/res/values/config.xml

@@ -893,4 +893,10 @@
 
     <!-- Whether or not wcg mode should be enabled on this device -->
     <bool name="config_enableWcgMode">true</bool>
+
+    <!-- Flag indicating whether the surface flinger has limited
+         alpha compositing functionality in hardware.  If set, the window
+         manager will disable alpha trasformation in animations where not
+         strictly needed. -->
+    <bool name="config_sf_limitedAlpha">true</bool>
 </resources>