Implemented FAB auto-scroll-hide behaviors

[thefex]

Usage:

  <android.support.design.widget.FloatingActionButton
    android:id="@+id/autoScrollFab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/ic_check_white_24dp"
    android:layout_margin="16dp"
    android:layout_gravity="bottom|right"
    local:elevation="4dp"
    local:backgroundTint="@color/colorPrimary"
    local:rippleColor="@color/colorPrimaryDark" 
   ** local:layout_behavior="@string/fab_scroll_translation_autohide_behavior" />**

For translation animation (bottom corner FAB case)

  <android.support.design.widget.FloatingActionButton
    android:id="@+id/autoScrollFab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/ic_check_white_24dp"
    android:layout_margin="16dp"
    android:layout_gravity="bottom|right"
    local:elevation="4dp"
    local:backgroundTint="@color/colorPrimary"
    local:rippleColor="@color/colorPrimaryDark" 
   ** local:layout_behavior="@string/fab_scroll_shrink_grow_autohide_behavior" />**

for shrink-grow animation (appbar fab case)

[martijn00]

Thanks!