new system property media.ringtone.force_repeat

new system property 'media.ringtone.force_repeat' to be set in build.prop. Forces repeat of ringtone if tag ANDROID_LOOP is not set in .ogg file

Author: lagloose
Change-Id: I8d8f70ea3b20b1d8185689c7b4054a11134f9353
Merge "new system property media.ringtone.force_repeat" into cm-10.1