MTK8788，Android9.0开机默认系统最大音量

+++ b/build/make/tools/buildinfo.sh
@@ -62,3 +62,5 @@ fi
 echo "ro.build.characteristics=$TARGET_AAPT_CHARACTERISTICS"
 
 echo "# end build properties"
+
+echo "ro.config.media_vol_default=15"

+++ b/device/mediateksample/tb8788p1_64_bsp/system.prop
@@ -75,3 +75,4 @@ ro.mtk_perf_response_time=1
 # disable ipo for development
 sys.ipo.disable=1
 service.adb.tcp.port=5555
+ro.config.media_vol_default=30
 No newline at end of file

+++ b/frameworks/base/media/java/android/media/AudioSystem.java
@@ -885,17 +885,17 @@ public class AudioSystem
     * M: modify the default stream volume @{
     */
     public static int[] DEFAULT_STREAM_VOLUME = new int[] {
-        4,   // STREAM_VOICE_CALL
+        15,   // STREAM_VOICE_CALL
         15,  // STREAM_SYSTEM
-        8,   // STREAM_RING
-        8,   // STREAM_MUSIC
-        8,   // STREAM_ALARM
-        8,   // STREAM_NOTIFICATION
-        7,   // STREAM_BLUETOOTH_SCO
+        15,   // STREAM_RING
+        15,   // STREAM_MUSIC
+        15,   // STREAM_ALARM
+        15,   // STREAM_NOTIFICATION
+        15,   // STREAM_BLUETOOTH_SCO
         15,  // STREAM_SYSTEM_ENFORCED
-        11,  // STREAM_DTMF
-        11,  // STREAM_TTS
-        11,  // STREAM_ACCESSIBILITY
+        15,  // STREAM_DTMF
+        15,  // STREAM_TTS
+        15,  // STREAM_ACCESSIBILITY
     };
     
 
diff --git a/frameworks/base/services/core/java/com/android/server/audio/AudioService.java b/frameworks/base/services/core/java/com/android/server/
audio/AudioService.java
old mode 100644
new mode 100755
index 5069871..e7a5e5e
--- a/frameworks/base/services/core/java/com/android/server/audio/AudioService.java
+++ b/frameworks/base/services/core/java/com/android/server/audio/AudioService.java
@@ -312,7 +312,7 @@ public class AudioService extends IAudioService.Stub
    
     /// M: Modify the max stream volume @{
     protected static int[] MAX_STREAM_VOLUME = new int[] {
-        7,   // STREAM_VOICE_CALL
+        15,   // STREAM_VOICE_CALL
         15,  // STREAM_SYSTEM
         15,  // STREAM_RING
         15,  // STREAM_MUSIC

+++ b/system/sepolicy/public/property_contexts
@@ -92,6 +92,7 @@ ro.com.android.prov_mobiledata u:object_r:exported3_default_prop:s0 exact bool
 ro.com.google.clientidbase u:object_r:exported3_default_prop:s0 exact string
 ro.config.alarm_alert u:object_r:exported2_config_prop:s0 exact string
 ro.config.media_vol_steps u:object_r:exported2_config_prop:s0 exact int
+ro.config.media_vol_default u:object_r:exported2_config_prop:s0 exact int
 ro.config.notification_sound u:object_r:exported2_config_prop:s0 exact string
 ro.config.ringtone u:object_r:exported2_config_prop:s0 exact string
 ro.control_privapp_permissions u:object_r:exported3_default_prop:s0 exact string