Remove excess dependency on libGLESv2

libgui_bufferqueue_static is linked statically as part of
com.android.media.swcodec, libGLESv2 is neither part of the apex nor
providing apex stubs, so the dependency should be avoided. It also
appears to be unnecessary.

Test: m libgui_bufferqueue_static libgui libgui_mocks
Change-Id: Ia9d94d8b294ad1c3d30d4794bf71d4f6da7dc623