axolotl: Media volume: from 15 to 25 steps

Test: play media, use all 25 vol steps and observe varying attenuation
Bug: 32195657
Change-Id: I7ac87df0b2b15de3a7bb87e739bd88ef7b185236
diff --git a/vendor.prop b/vendor.prop
index 68d7da2..c4cf15d 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -12,6 +12,7 @@
 persist.vendor.audio.fluence.voicerec=false
 persist.vendor.audio.ras.enabled=false
 ro.af.client_heap_size_kbyte=7168
+ro.config.media_vol_steps=25
 ro.config.vc_call_vol_steps=7
 ro.vendor.audio.sdk.fluencetype=fluence
 ro.vendor.audio.sdk.ssr=false