Mostly it's disk reads/writes.
Conscrypt reads own version on startup which reads from disk multiple
times. There's no solution for it right now.
SharedPreferences which are used in BaseActivity also read from disk
and pretty early but it shouldn't be a problem.
* Improve notifications fetching
- Only fetch notifications up to the latest fetched one
- Use timeline markers to avoid showing already seen notifications
* Apply some of the suggestions
* convert EmojiPreference and EmojiCompatFont to Kotlin
* move preference related to to dedicated preference package
* update proguard-rules.pro
* reformat & add comment
* maintain disposable information in EmojiPreference instead of EmojiCompatFont
* convert MainActivity to Kotlin
* migrate to MaterialDrawer 8
* fix drawer styles
* revert removing BezelImageView and material_drawer_header override
* fix tests
* add lost comment back to material_drawer_header.xml
* add tools:parentTag to material_drawer_header.xml
* use when instead of if in MainActivity
* fix statusbar color over the drawer
* cleanup drawer item creation
* tint secondary drawer items as well
* remove unnecessary ids
* fix header text color in the light theme
* improve header text contrast
