Issue #2267: About us section just after launching app does not close navigation drawer and take longer time than usual

[sumansahoo1]

Fixes #2267

Changes:

• mode of the device - from only light mode to choose according to device

Screen shots for the changes:

Record_2021-11-15-09-54-40.mp4

Checklist:

• I have used resources from strings.xml, dimens.xml and colors.xml without hard-coding any value.
• No modifications done at the end of resource files strings.xml, dimens.xml or colors.xml.
• I have reformatted code and fixed indentation in every file included in this pull request
• My code does not contain any extra lines or extra spaces.
• I have requested reviews from maintainers.

[sumansahoo1]

@CloudyPadmal , please review this

[sumansahoo1]

@CloudyPadmal , please review this pr.