listview: ensure active views are filled prior than scrap views

The internal Recycler#fillActiveViews should be called prior to add any view
to the scrapViews queue, so it can be use safely without detaching views
because out of sync.

Change-Id: Ie119ad871a89e0a3fa1e07e955fcd5ca7b171f46
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
hwui: Always enable the scissor while composing layer

Due to scissor optimization feature added in KK, scissor was disabled
all the time. Hence the undefined areas/region of textures are not
masking properly with GL_LINEAR filter mode.

Change-Id: Ifbbde2c67a4c01e45eda07ada709e066255fffcb
CRs-fixed: 645077