Improve condition to update the sticky content

[Paul Laturaze]

If the update is not required, reset the translation if any:

 if ( !isHeaderUpdateRequired( ) ) {
            if(mStickyViewParent.getTranslationY() != 0){
                resetStickyHeaderTranslation();
            }
            return;
        }

isHeaderUpdateRequired() should be true if we need to update the Sticky content :

private boolean isHeaderUpdateRequired( ) {
        return isHeader( mFirstVisiblePos ) || isCurrentHeaderPushed
                || mHeaderPosition == RecyclerView.NO_POSITION
                || shouldUpdateStickyHeaderContent();
    }

[Paul Laturaze]

Closed in 0.1.2