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1. Manually request focus for input fields and show keyboard This is needed when targetting API 28 which doesn't give focus anymore automatically like it used to be. Closes #1505 2. Remember keyboard states across screen rotations This also upgrades the emoji library and gets rid of the KeyboardAwareLinearLayout that is still a relict from the time when we were using Signal's emoji implementation. 3. Move soft keyboard showing/hiding into UiUtils