Monitor /data/system/packages.xml

Reinstalling system apps as data creates tons of issues.
Calling pm path <pkg> is extremely expensive and doesn't work in post-fs-data.
Parse through packages.xml to get APK path and UID at the same time.
As a bonus, we don't need to traverse /data/app for packages anymore.

native/jni/utils/include/utils.h

@@ -201,6 +201,8 @@ int exec_command_sync(Args &&...args) {
 	return exec_command_sync(exec, args...);
 }
 
+bool ends_with(const std::string_view &s1, const std::string_view &s2);
+
 #endif
 
 #endif