kitakami-common: Media volume: from 15 to 25 steps

Test: play media, use all 25 vol steps and observe varying attenuation
Bug: 32195657
Change-Id: I7ac87df0b2b15de3a7bb87e739bd88ef7b185236

system.prop

@@ -66,6 +66,7 @@ ro.lmk.kill_timeout_ms=100
 ro.lmk.use_minfree_levels=true
 
 # Media
+ro.config.media_vol_steps=25
 media.stagefright.enable-player=true
 media.stagefright.enable-http=true
 media.stagefright.enable-aac=true