sm7325-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

@@ -100,6 +100,12 @@ void setVendorEnhanced(bool vendorEnhanced) {
     sVendorEnhanced = vendorEnhanced;
 }
 
+bool isXtraDaemonEnabled() {
+    bool enabled = property_get_bool("persist.sys.xtra-daemon.enabled", false);
+    LOC_LOGe("xtra-daemon enabled: %d\n", enabled);
+    return enabled;
+}
+
 /*===========================================================================
 FUNCTION loc_get_datum_type
 
@@ -821,6 +827,13 @@ 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 (strcmp(conf.proc_status, "DISABLED") == 0) {
             LOC_LOGD("%s:%d]: Process %s is disabled in conf file",
                      __func__, __LINE__, conf.proc_name);

rootdir/etc/init/hw/init.qcom.rc

@@ -551,6 +551,9 @@ service loc_launcher /system/vendor/bin/loc_launcher
     user gps
     group gps
 
+on property:persist.sys.xtra-daemon.enabled=*
+    restart loc_launcher
+
 service qcom-sh /vendor/bin/init.qcom.sh
     class late_start
     user root