npem: fix permissions not being granted

I messed up with the last fix. While that solved the case where there were
both 'granted=true' and 'granted=false' entries, it introduced a regression.

It was written with the assumption that whenever a permission is not granted,
there will be 'granted=false' entries. That assumption was not tested well
at the time, and further testing has revealed that there are also many
situations where there are no 'granted=' entries for permissions at all, not
even 'false'.

Since there is no defined spec for the output of dumpsys, we just do a
pessimistic case-by-case parsing of its output.

Full/system/bin/nanodroid-perm

@@ -38,7 +38,10 @@ check_package () {
 }
 
 check_permission () {
-	[[ $(dumpsys package ${1} | grep -Eo "^[ ]+${2}: granted=false") ]] && return 1 || return 0
+	perm="$(dumpsys package ${1} | grep "^ *${2}: granted=")"
+	echo "$perm" | grep -q "granted=false" && return 1
+	echo "$perm" | grep -q "granted=true" && return 0
+	return 1
 }
 
 grant_permission () {