Remove opaque check in GLRenderer when preparing dirty region.

Since preserved swap is enabled, we need to clear the color buffer
when the scissor rect is prepared for a new process. This prevents
garbage to be present from the previous process in the color buffer.

CRs-Fixed: 391492, 403067, 405916

Change-Id: I1f72a3dee2f5d58a984f4cd367c9f7bf08ab9d6a

Conflicts:

	libs/hwui/OpenGLRenderer.cpp

[PATCH] Remove opaque check in preparing dirty region

Since preserved swap is enabled, we need to clear the color buffer
when the scissor rect is prepared for a new rocess. This prevents
garbage to be present from the previous process in the color buffer.

(cherry picked from commit 2b5e584e2615852b68a69bb529c6926190246b64)

Change-Id: I92a4fa35e0746f12fcd736e21fd30d9c4b644a8a
CRs-Fixed: 391492, 403067, 405916

Conflicts:

	libs/hwui/OpenGLRenderer.cpp

Enable scissor when preparing dirty rect that is opaque

Now enabling scissor before setting it in the opaque case, previously was not doing so.

Change-Id: I1ea904cf01603096e423556090564291ab712d36
CRs-Fixed: 465346
Depends-on: 278453

Remove opaque check in preparing dirty region

Since preserve swap is enabled, we need to clear the color buffer
when the scissor rect is prepared for a new process. This prevents
garbage being present from the previous process in the color buffer.

CRs-Fixed: 465346
Change-Id: I98f2009748244751c4b56af8afbdfeb645c13230
Fix layout of MultiWaveView and GlowPadView.

If the calculated size of the rings is much smaller than the measured
size (which is happening e.g. on mdpi 600x1024 tablets), the glow pad
appeared shifted to the right.
This happened due to the insets being calculated as difference of
available and needed size, and later on being added to the available
size. Example numbers (Nexus 4 with density forced to 160):
- computed size in onMeasure: 768x505
- scaled size in onMeasure: 505x505
- thus, insets are calculated as 131/0
- in onLayout, placementWidth (364) and max target width (108) are much
  smaller than width (768)
- thus, center is calculated as 131 + (768 / 2) = 515, thus shifted to
  the right

Fix that by not using width in the calculation, as the inset size
already takes it into consideration.

JIRA:CYAN-829
Change-Id: Ifc2a93214f812f554a8fed3243eed66aec9f00c9