[Tizen] Remove audio-session-manager patch from the spec.

This patch is not needed when building, since we are setting the
audio streams "media.role" property directly in the pulseaudio.

We will be re-using the code for Muprhy integration in the
future, so keeping the file in packaging/ directory.
Merge pull request #1772 from nagineni/asm_del

[Tizen] Remove audio-session-manager patch from the spec.