Create MaterialFromFile.java

MaterialFromFile.java read a material file from assets

usage:

	public BloomFilter() {
		super(  MaterialFromFile.openFileFromAssets("baseFilter.vert"), 
				MaterialFromFile.openFileFromAssets("bloomBlurFilter.frag"), false);
		setShaders(mUntouchedVertexShader, mUntouchedFragmentShader);
	}