chore: converted strings displayed to the user into string resource objects.

[ReCodee]

Fixes #1054

Description

Converted strings displayed to the user into string resource objects and strings which are being used in the backend are in Constants.java

• [x] Apply the AndroidStyle.xml style template to your code in Android Studio.

• [x] Run the unit tests with ./gradlew check to make sure you didn't break anything

• [x] If you have multiple commits please combine them into one commit by squashing them.

[ReCodee]

@shiv07tiwari @devansh-299 Please review this PR :)

[Prashant830]

@ReCodee I think, In your branch have a code conflict . Are u still able to resolved it??

[therajanmaurya]

Unrelated and not needed anymore