Smoother system bars color transition

Easing out too fast makes the status bar feel like it's flashing.

Test: visual
Change-Id: I3c6fb528efd22d13f890024e73b76d2e50d71163
Fixes: 63629289

packages/SystemUI/src/com/android/systemui/statusbar/phone/LightBarTransitionsController.java

@@ -167,7 +167,7 @@ public class LightBarTransitionsController implements Dumpable, Callbacks {
                 animation -> setIconTintInternal((Float) animation.getAnimatedValue()));
         mTintAnimator.setDuration(duration);
         mTintAnimator.setStartDelay(delay);
-        mTintAnimator.setInterpolator(Interpolators.FAST_OUT_SLOW_IN);
+        mTintAnimator.setInterpolator(Interpolators.LINEAR_OUT_SLOW_IN);
         mTintAnimator.start();
     }