sm8450-common: Implement xtra-daemon control via property

Default to false if the property is not set.
Device init scripts will need to be adapted to restart
loc_launcher service when property change is detected.

Change-Id: Icbda789cd2a9a3391f437af2c07fc5127f2f09ab

gps/utils/loc_cfg.cpp

@@ -94,6 +94,12 @@ const char LOC_PATH_SLIM_CONF[] = LOC_PATH_SLIM_CONF_STR;
 const char LOC_PATH_VPE_CONF[] = LOC_PATH_VPE_CONF_STR;
 const char LOC_PATH_QPPE_CONF[] = LOC_PATH_QPPE_CONF_STR;
 
+bool isXtraDaemonEnabled() {
+    bool enabled = property_get_bool("persist.sys.xtra-daemon.enabled", false);
+    LOC_LOGe("xtra-daemon enabled: %d\n", enabled);
+    return enabled;
+}
+
 bool isVendorEnhanced() {
     return sVendorEnhanced;
 }
@@ -818,6 +824,13 @@ int loc_read_process_conf(const char* conf_file_name, uint32_t * process_count_p
             continue;
         }
 
+        if (strcmp(conf.proc_name, "xtra-daemon") == 0 && !isXtraDaemonEnabled()) {
+            LOC_LOGE("%s:%d]: Process xtra-daemon is disabled via property",
+                     __func__, __LINE__);
+            child_proc[j].proc_status = DISABLED_FROM_CONF;
+            continue;
+        }
+
         if (!isVendorEnhanced() && (conf.vendor_enhanced_process != 0)) {
             LOC_LOGD("%s:%d]: Process %s is disabled via vendor enhanced process check",
                      __func__, __LINE__, conf.proc_name);

rootdir/etc/init.xiaomi_sm8450.rc

@@ -223,6 +223,9 @@ on property:vendor.audio.cit.spkcal.copy=true
     chmod 666 /mnt/vendor/persist/audio/aw_calr.bin
     chmod 666 /mnt/vendor/persist/audio/aw_calr.txt
 
+on property:persist.sys.xtra-daemon.enabled=*
+    restart loc_launcher
+
 service vendor.nv_mac /vendor/bin/nv_mac
     class late_start
     user system