improve console logging
improve console logging

Summary:
* Always log when PRINT_TO_CONSOLE true - o reason to also check DEV.
* Log when `clearExceptTimespans` is called.
* Type `PRINT_TO_CONSOLE: false` to prevent accidental commits setting it true.

Reviewed By: alexeylang

Differential Revision: D7816623

fbshipit-source-id: 47cf7e158133045e20b345139efb1a79e5e6553b

janicduplessis/react-native,pandiaraj44/react-native,janicduplessis/react-native,javache/react-native,exponent/react-native,arthuralee/react-native,hammerandchisel/react-native,pandiaraj44/react-native,hoangpham95/react-native,myntra/react-native,hoangpham95/react-native,exponentjs/react-native,exponentjs/react-native,hammerandchisel/react-native,myntra/react-native,javache/react-native,hammerandchisel/react-native,exponentjs/react-native,javache/react-native,javache/react-native,pandiaraj44/react-native,exponentjs/react-native,pandiaraj44/react-native,arthuralee/react-native,facebook/react-native,javache/react-native,arthuralee/react-native,hoangpham95/react-native,myntra/react-native,janicduplessis/react-native,exponentjs/react-native,hammerandchisel/react-native,facebook/react-native,facebook/react-native,pandiaraj44/react-native,myntra/react-native,javache/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,exponent/react-native,hoangpham95/react-native,exponent/react-native,hoangpham95/react-native,exponentjs/react-native,myntra/react-native,javache/react-native,exponent/react-native,pandiaraj44/react-native,janicduplessis/react-native,exponent/react-native,myntra/react-native,hammerandchisel/react-native,hoangpham95/react-native,javache/react-native,myntra/react-native,hammerandchisel/react-native,exponent/react-native,hammerandchisel/react-native,myntra/react-native,arthuralee/react-native,hoangpham95/react-native,exponent/react-native,janicduplessis/react-native,exponentjs/react-native,hoangpham95/react-native,janicduplessis/react-native,facebook/react-native,janicduplessis/react-native,myntra/react-native,facebook/react-native,javache/react-native,hammerandchisel/react-native,exponent/react-native,exponentjs/react-native,arthuralee/react-native,pandiaraj44/react-native,pandiaraj44/react-native,facebook/react-native,facebook/react-native