Fix graphics corruption caused by HWUI caches

Some caches(PatchCache, TextureCache, PathCache) for HWUI
uses deferred removal for their cache entries even though
actual resource objects are immediately freed by
ResourceCache.
For this reason, the uniqueness of a resource address in
the caches is not guaranteed in specific cases.
(Because malloc() can return the same address when malloc()
and free() called very frequently.)

So it can be possible the cache have two cache entries for
two different resources but the same memory address.
(Of course one of the resources is already freed.)
It also can be possible mGarbage vector in PatchCache has
duplicated addresses and this can lead to duplicated free
blocks in the free block list and graphics corruption.
(Deferred removal was implmeneted based on an assumption of
unique resource addresses.)

So this patch makes sure resource objects are freed after
the resources are removed from the caches to guarantee
the uniqueness of a resource address and prevent graphics
corruption.

Change-Id: I040f033a4fc783d2c4bc04b113589657c36fb15b
Signed-off-by: Sangkyu Lee <sk82.lee@lge.com>
Fix for positioning of glyphs within a bitmap

For positioning of glyphs within a bitmap, roundf(int + float) is used,
where the float is the glyph position and the int is the text position.
When the text position is varied, this may lead to the sum being rounded
in different directions, due to floating point rounding, caused by that
floating point numbers have different precision in different ranges.

This may therefore lead to slightly different positioning for glyphs and
therefore slightly different widths and heights for text strings,
depending on the position they are rendered at.

The solution in this patch is to use int + (int) roundf(float), which
has consistent rounding, and also enables us to use the full range of
ints.

Change-Id: Id1143cdfcbdfa9915ced878ae04df589a3e03cee
Fix a bug in KeyStore.getInstance().

Sometimes keystore process may die unexpectedly, so client cannot connect it.

Let KeyStore.getInstance() return null when it cannot get KeyStore
service, so that caller can get informed to prevent NullPointerExcepion.

Change-Id: I7aafc959dee9a77fda80ab6eb5c82f9a3f56f959
Signed-off-by: hanpengx <pengfeix.han@intel.com>
Signed-off-by: Guobin Zhang <guobin.zhang@intel.com>