Allow gsid to callback system server for oneway method

Bug: 149790245
Bug: 149716497
Test: adb shell am start-activity \
    -n com.android.dynsystem/com.android.dynsystem.VerificationActivity \
    -a android.os.image.action.START_INSTALL \
    -d file:///storage/emulated/0/Download/system.raw.gz \
    --el KEY_SYSTEM_SIZE $(du -b system.raw|cut -f1) \
    --el KEY_USERDATA_SIZE 8589934592

Change-Id: I41c7b1278cfc103c90282b6a6781eab66fc9dcdb
diff --git a/private/gsid.te b/private/gsid.te
index 5d7b043..3ff9d67 100644
--- a/private/gsid.te
+++ b/private/gsid.te
@@ -135,6 +135,8 @@
       ota_image_data_file
 }:file ioctl FS_IOC_FIEMAP;
 
+allow gsid system_server:binder call;
+
 neverallow {
     domain
     -init