FFMPEGMediaPlayer: Fix yuv stored in alpha shader decode on ES2 and GL2

Regression introduced by:
dba2faf8520a43a809eb756869c6c97a0a2ef2cd
FFMPEGMediaPlayer: Cleanup AudioPusher 'usage', i.e. disabled for now (subject to be removed).
Movie JNLP/NAppletAdd: joal jar file shall come before jogl's (dependency - refine commit 3e4dac6373185a1a9061b394601221052b2bef84)