Refine scripts

1. flock when startapp, check the lock when pause  in rc.civ.post,
   if the lock cannot be acquired, then skip pause
2. sleep 3 seconds before pause in lg_launcher.sh, give a window for
   guest to complete some tasks

Tracked-On: OAM-100189
Signed-off-by: Yadong Qi <yadong.qi@intel.com>

Author: YadongQi

host/bins/cfc-0.1.0-x64.deb

@@ -65,6 +65,6 @@ balloon_civ
 
 /opt/lg/bin/LG_B1_Client_clipboard guestClipboard:enable=true &
 
-pause_civ
+flock -n -x /var/lock/civ_startapp.lock pause_civ ||
 
 exit 0

host/src/pack/dpkg/etc/rc.civ.post

@@ -29,7 +29,9 @@ if [ "$num_start_app" -lt "1" ];
 then
     if ! systemctl --user is-active civ ;
     then
-        /opt/lg/bin/startapp
+        flock -x /var/lock/civ_startapp.lock /opt/lg/bin/startapp
+        # startapp might spwan a adb server which will hold the lock even after startapp exit, kill the adb server here to release the lock
+        adb kill-server
     fi
     # Resume CiV
     /opt/cfc/mwc/bin/resume_civ.sh
@@ -97,6 +99,9 @@ if [ ! -z ${ENABLE_CIV_BALLOON} ]; then
     fi
 fi
 
+# delay for guest to finish some tasks
+sleep 3
+
 # Pause CiV
 if [ -z "$(pidof mwc_launcher)" ] && [ -z "$(pidof LG_B1_Client)" ] && [ -z "$(pgrep -ax adb | grep -v "fork-server")" ]; then
     /opt/cfc/mwc/bin/pause_civ.sh