* added platform source files (from cyanogenmod) for easier compiling,
* added Xposed description, compiled against current sdk
(version of platform files: https://github.com/CyanogenMod/android_frameworks_opt_telephony/commit/c08850a748ce61895e2b537c8ddb80ae68796288#diff-6c1480c288219cb602881feb34a0f0ec )