Code review comment for lp:~kdub/mir/android-internal-client

furthermore, I added some comments in a bug that exists in current lp:mir (https://bugs.launchpad.net/mir/+bug/1177902) which is a namespace collision in our .so's for the symbol mir_egl_mesa_display_is_valid. The workaround in lines 1105-1114 can be removed with some coordination with changing the mir platform in mesa