Move Makefiles for upstream modules to projects/android

The upstream modules store all project files in a projects/${PROJECT_TYPE}
directory. Using the same scheme for the Android target maybe makes it
easier for an upstream merge.
rsp-hle: Merge together with rsp-hle-nosound

The only difference between rsp-hle and rsp-hle-nosound is a small hack
which disables the audio microcode emulation. Merging both together allows
an easier merging of upstream changes.

The difference is now handled by the preprocessor. A configuration option
should be considered for the future.