Support new Mali GPUs (#19411)

* Support new Mali GPUs

Some new Mali GPUs use FP16 for matrix that is not precise enough. Should be FP32. Tested on Mali-T880.

The same issue is described here:
https://discuss.cocos2d-x.org/t/critical-issue-regarding-rendering-on-devices-with-renderer-type-mali/45568

* More convenient way to fix the shader precision.

Author: AIGRIND-LLC

Diff for: cocos/renderer/CCGLProgram.cpp

@@ -489,7 +489,9 @@ bool GLProgram::compileShader(GLuint * shader, GLenum type, const GLchar* source
 // Bugfix to make shader variables types constant to be understood by the current Android Virtual Devices or Emulators. This will also eliminate the 0x501 and 0x502 OpenGL Errors during emulation.
 // Changed shader data types mediump to highp to remove possible sprite joggling on some Android phones.
 #elif CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
-        headersDef = "#version 100\n precision highp float;\n precision highp int;\n";
+        headersDef = (type == GL_VERTEX_SHADER ?
+            "#version 100\n precision highp float;\n precision highp int;\n" :
+            "#version 100\n precision mediump float;\n precision mediump int;\n");
 #elif (CC_TARGET_PLATFORM != CC_PLATFORM_WIN32 && CC_TARGET_PLATFORM != CC_PLATFORM_LINUX && CC_TARGET_PLATFORM != CC_PLATFORM_MAC)
         headersDef = (type == GL_VERTEX_SHADER ? "precision highp float;\n precision highp int;\n" : "precision mediump float;\n precision mediump int;\n");
 #endif