Request: add option to log for all functions, if taken too long, especially for UI thread

[AndroidDeveloperLB]

When the UI takes too long on some function, it could be nice to know what's the cause of it. It can also be useful for functions that we might be able to optimize.

Please offer some flags to handle these. Maybe add some configuration for these. For example, we could mark it to log non-UI functions if they take more than 1sec, and for UI functions if they take more than 30ms (I'm generous because of the toll of the library).