http://valinet6l6tq6d5yohaa6gdsf2ho4qcqcxyj2nahp5kd4z7nsa6ycdqd.onion/2020/06/16/Get-browser-forward-gesture-on-Android-10-Pixel-Experience-Plus-ROM-for-Poco-F1.html
Now, the best strategy is to search for what you believe is the thing that is less likely to be repeated for a lot of times and get from there, by observing how opcode patterns relate to the source code you got above.