Tuned anti-falsing thresholds on the lockscreen

Also added logic to provide nicer animations when falsing.
In addition adapted the clock scale slightly if dragging
in the void.

Bug: 15433087
Change-Id: I4d8eb26cc81d22647ef4d2eca1e69b4994a7f1e2
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
index e818d23..a31984f 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
@@ -479,7 +479,7 @@
      * @return whether a fling should expands the panel; contracts otherwise
      */
     protected boolean flingExpands(float vel, float vectorVel) {
-        if (!mTouchAboveFalsingThreshold && mStatusBar.isFalsingThresholdNeeded()) {
+        if (isBelowFalsingThreshold()) {
             return true;
         }
         if (Math.abs(vectorVel) < mFlingAnimationUtils.getMinVelocityPxPerSecond()) {
@@ -489,6 +489,10 @@
         }
     }
 
+    private boolean isBelowFalsingThreshold() {
+        return !mTouchAboveFalsingThreshold && mStatusBar.isFalsingThresholdNeeded();
+    }
+
     protected void fling(float vel, boolean expand) {
         cancelPeek();
         float target = expand ? getMaxPanelHeight() : 0.0f;
@@ -509,7 +513,14 @@
         mOverExpandedBeforeFling = getOverExpansionAmount() > 0f;
         ValueAnimator animator = createHeightAnimator(target);
         if (expand) {
+            boolean belowFalsingThreshold = isBelowFalsingThreshold();
+            if (belowFalsingThreshold) {
+                vel = 0;
+            }
             mFlingAnimationUtils.apply(animator, mExpandedHeight, target, vel, getHeight());
+            if (belowFalsingThreshold) {
+                animator.setDuration(350);
+            }
         } else {
             mFlingAnimationUtils.applyDismissing(animator, mExpandedHeight, target, vel,
                     getHeight());