Add function to find manager APK

Close #673

scripts/util_functions.sh

@@ -434,3 +434,13 @@ unmount_magisk_img() {
     $MAGISKBIN/magisk imgtool resize $IMG $newSizeM >&2
   fi
 }
+
+find_manager_apk() {
+  APK=/data/adb/magisk.apk
+  [ -f $APK ] || APK=/data/magisk/magisk.apk
+  [ -f $APK ] || APK=/data/app/com.topjohnwu.magisk*/*.apk
+  if [ ! -f $APK ]; then
+    DBAPK=`magisk --sqlite "SELECT value FROM strings WHERE key='requester'" | cut -d= -f2`
+    [ -z "$DBAPK" ] || APK=/data/app/$DBAPK*/*.apk
+  fi
+}