For #3135 - Reduce swipe to delete sensitivity

app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SwipeToDeleteCallback.kt

@@ -28,6 +28,14 @@ class SwipeToDeleteCallback(
         return false
     }
 
+    override fun getSwipeEscapeVelocity(defaultValue: Float): Float {
+        return defaultValue * SWIPE_VELOCITY_MULTIPLIER
+    }
+
+    override fun getSwipeThreshold(viewHolder: RecyclerView.ViewHolder): Float {
+        return SWIPE_THRESHOLD
+    }
+
     override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
         when (viewHolder) {
             is TabViewHolder -> actionEmitter.onNext(TabAction.Close(viewHolder.tab?.sessionId!!))
@@ -114,6 +122,8 @@ class SwipeToDeleteCallback(
     }
 
     companion object {
+        const val SWIPE_VELOCITY_MULTIPLIER = 10F
+        const val SWIPE_THRESHOLD = 0.55f
         const val BACKGROUND_CORNER_OFFSET = 40
         const val MARGIN = 32
         const val DENSITY_CONVERSION = 160f