backuptool: add missing CalendarProvider.apk

This fixes the broken Calendar Sync after restore

Change-Id: I2ea6c328f64d8fa3022238072cde36f6cb92105d
diff --git a/prebuilt/common/bin/backuptool.sh b/prebuilt/common/bin/backuptool.sh
index 0b5e07b..62ed43c 100755
--- a/prebuilt/common/bin/backuptool.sh
+++ b/prebuilt/common/bin/backuptool.sh
@@ -63,6 +63,7 @@
 app/GoogleFeedback.apk
 app/GoogleTTS.apk
 app/CalendarGoogle.apk app/Calendar.apk
+app/CalendarProvider.apk
 app/MarketUpdater.apk
 app/GoogleServicesFramework.apk
 app/YouTube.apk