follow OpenGApps and use API 21 Calender Sync for API 21+, API 19 Calendar Sync for API 19

CommonInstaller

@@ -1332,7 +1332,7 @@ nanodroid_install_apk () {
 	unset prefix
 	unset source
 
-	for sdir in system/app system/priv-app gsync/common/app \
+	for sdir in system/app system/priv-app \
 		gsync/${GSYNC_VER}/app gsync/${GSYNC_VER}/priv-app; do
 		if [ -f "${INSTALLER}/${sdir}/${app}/${app}.apk.gz" ]; then
 			source="${INSTALLER}/${sdir}/${app}/${app}.apk"

data/build-package.database

@@ -150,17 +150,22 @@ file_database=(
 	${appsfolder[4]}/GsfProxy/GsfProxy.apk.gz
 	${appsfolder[4]}/Phonesky/Phonesky.apk.gz
 
-	${appsfolder[5]}/common/app/GoogleCalendarSync/GoogleCalendarSync.apk.gz
+	${appsfolder[5]}/K/app/GoogleCalendarSync/GoogleCalendarSync.apk.gz
 	${appsfolder[5]}/K/app/GoogleContactsSync/GoogleContactsSync.apk.gz
 	${appsfolder[5]}/K/priv-app/GoogleBackupTransport/GoogleBackupTransport.apk.gz
+	${appsfolder[5]}/L/app/GoogleCalendarSync/GoogleCalendarSync.apk.gz
 	${appsfolder[5]}/L/app/GoogleContactsSync/GoogleContactsSync.apk.gz
 	${appsfolder[5]}/L/priv-app/GoogleBackupTransport/GoogleBackupTransport.apk.gz
+	${appsfolder[5]}/M/app/GoogleCalendarSync/GoogleCalendarSync.apk.gz
 	${appsfolder[5]}/M/app/GoogleContactsSync/GoogleContactsSync.apk.gz
 	${appsfolder[5]}/M/priv-app/GoogleBackupTransport/GoogleBackupTransport.apk.gz
+	${appsfolder[5]}/N/app/GoogleCalendarSync/GoogleCalendarSync.apk.gz
 	${appsfolder[5]}/N/app/GoogleContactsSync/GoogleContactsSync.apk.gz
 	${appsfolder[5]}/N/priv-app/GoogleBackupTransport/GoogleBackupTransport.apk.gz
+	${appsfolder[5]}/O/app/GoogleCalendarSync/GoogleCalendarSync.apk.gz
 	${appsfolder[5]}/O/app/GoogleContactsSync/GoogleContactsSync.apk.gz
 	${appsfolder[5]}/O/priv-app/GoogleBackupTransport/GoogleBackupTransport.apk.gz
+	${appsfolder[5]}/P/app/GoogleCalendarSync/GoogleCalendarSync.apk.gz
 	${appsfolder[5]}/P/app/GoogleContactsSync/GoogleContactsSync.apk.gz
 	${appsfolder[5]}/P/priv-app/GoogleBackupTransport/GoogleBackupTransport.apk.gz
 

data/build-package.download

@@ -266,12 +266,24 @@ grab_apk_from_gitlab () {
 grab_apk_from_ogapps () {
 	case "${1}" in
 		"com.google.android.syncadapters.calendar" )
-			local apk_url="https://gitlab.opengapps.org/opengapps/all/raw/master/${2}/${1}/15/nodpi/2015080710.apk"
-			local api_letter=common
+			case "${4}" in
+				19 ) local api_letter=K ;;
+				21 ) local api_letter=L ;;
+				23 ) local api_letter=M ;;
+				24 ) local api_letter=N ;;
+				26 ) local api_letter=O ;;
+				28 ) local api_letter=P ;;
+			esac
+
+			if [ "${4}" -eq 19 ]; then
+				local apk_url="https://gitlab.opengapps.org/opengapps/all/raw/master/${2}/${1}/15/nodpi/2015080710.apk"
+			else
+				local apk_url="https://gitlab.opengapps.org/opengapps/all/raw/master/${2}/${1}/21/nodpi/2016184095.apk"
+			fi
 		;;
 
 		* )
-			apk_url="https://gitlab.opengapps.org/opengapps/all/raw/master/${2}/${1}/${4}/nodpi/${4}.apk"
+			local apk_url="https://gitlab.opengapps.org/opengapps/all/raw/master/${2}/${1}/${4}/nodpi/${4}.apk"
 			case "${4}" in
 				19 ) local api_letter=K ;;
 				21 ) local api_letter=L ;;

data/build-package.update

@@ -78,11 +78,10 @@ update_microg () {
 grab_gsync () {
 	#          KK LL M  N  O  P
 	for API in 19 21 23 24 26 28; do
+		grab_apk_from_ogapps ${og_CALSYNC[@]} ${API}
 		grab_apk_from_ogapps ${og_CONSYNC[@]} ${API}
 		grab_apk_from_ogapps ${og_BTRANSP[@]} ${API}
 	done
-
-	grab_apk_from_ogapps ${og_CALSYNC[@]}
 }
 
 update_gsync () {