Fix a texture problem when loading PVR image

Fix a bug which causes current texture changed when loading a PVR image with GLStateCache enabled.
export Cocos2dxActivity frame layout for derived classes
[ci skip]
fix bug: crash in ui csbs
Merge pull request #7420 from geron-cn/chukongv2

fix bug: crash in ui csbs
export Cocos2dxActivity frame layout for derived classes
Merge branch 'export_framelayout' of https://github.com/zawasp/cocos2d-x into export_framelayout
Merge pull request #7423 from zawasp/export_framelayout

Export framelayout
Compilation fix for LabelReader.cpp
Merge pull request #7486 from dumganhar/v2.2.5

Compilation fix for LabelReader.cpp
[ci skip]
fixed read armature skew default value error
remove Clear Stencil to avoid double clear of ClippingNode(clear will discard buffer masks on some android device)
fixed cannot set blendfunc to Armature
Merge branch 'v2' of https://github.com/cocos2d/cocos2d-x into v2
Merge pull request #7569 from 2youyouo2/v2

update armature
Optimize FPS control algorithm under Android.
Fix the default value for project creator's script
Merge pull request #7596 from timotei/v2

Fix the default value for project creator's script
Merge pull request #7547 from dabingnn/cocos2.2.5

remove Clear Stencil