sm7125: overlay: set transition speed to 0.5

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

@@ -1299,4 +1299,12 @@
          manager will disable alpha trasformation in animations where not
          strictly needed. -->
     <bool name="config_sf_limitedAlpha">true</bool>
+
+     <!-- The default value for transition animation scale found in developer settings.
+         1.0 corresponds to 1x animator scale, 0 means that there will be no transition
+         animations. Note that this is only a default and will be overridden by a
+         user-set value if toggled by settings so the "Transition animation scale" setting
+         should also be hidden if intended to be permanent. -->
+    <item name="config_appTransitionAnimationDurationScaleDefault" format="float" type="dimen">0.5</item>
+
 </resources>