SurfaceFlinger: Native changes to add blur effect

Native changes to add blur-behind and blur mask effect

Change-Id: I54faf82d750e8299de6d261f6a893ab26d08df84

SurfaceFlinger: Adding template for LayerBlur files

Change-Id: I444009113b7bdd6c5284863fd1f56358e67d9fe6

SurfaceFlinger: Featurize libuiblur module for OSS build

Change-Id: Ifdc176e699434125d17b111c044b8ba954cf717c

sf : Apply user defined panel orientation to blur layer

Blur layer need to capture screen shot to create to blur
effect. Hence need to take care any user defined orientation
as well.

Change-Id: I1c0478810d12661edf2586293bbed342a5b4dc7e

surfaceflinger: Cleanups for blur

 * Dynamically load it so no direct linkage or headers are required.

Change-Id: I4eba035f527ae4f0fa2485e24a8586145baf0adc

surfaceflinger: Fix uninitialized variable

 * And don't try to reinit the lib after a failure.

Change-Id: Ic055a48670ed8cf01e27b16c5d4ddf214db53d20