Android OpenGL Canvas Versions Save

Add GaussianBlurFilter & Fix FilterGroup ViewPort Issue (1.5.4, Thanks to @iffly)

Update libraries version for example. And example supports Kotlin
Migrate to AndroidX
Support flipping horizontally. Thanks to https://github.com/zatrit

• 添加录屏demo

• 添加clearTextureCache，比弱引用更快释放内存 (1.5.2)

• AndroidCanvasHelper能直接操作Canvas里的bitmap了 (1.5.2)

• Add record screen demo

• Add clearTextureCache to help clear cache faster than WeakHashMap. (1.5.2)

• Can operate bitmap when using AndroidCanvasHelper (1.5.2)

1. Optimize some code for setSharedEglContext
2. Add ScreenRecord example

• TwoTextureFilter支持RawTexture了

• drawSurfaceTexture也支持BitmapMatrix了

• The TwoTextureFilter supports RawTexture.

• The drawSurfaceTexture supports BitmapMatrix.

• 修复BitmapMatrix rotate导致的变形
• Fix the out of shape when using rotate matrix;

再次修复BitmapMatrix translate导致的变形 Fix the out of shape when using translate matrix

修复BitmapMatrix translate导致的变形 Fix the out of shape when using translate matrix

Fix FilterGroup on drawSurfaceTexture 修复FilterGroup无法应用在SurfaceTexture上的问题

1. Fix subtle index out of bound exception