Build Performance Improvement: Use non-constant R classes

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**Is your feature request related to a problem? Please describe.**
Currently non-final Resource Id flag has been disabled in the gradle.properties file. However, it should have been enabled for faster compilation and for better resource shrinking. More details are available here: https://developer.android.com/build/optimize-your-build#use-non-constant-r-classes

**Describe the solution you'd like**
Enable the flag and refactor the code to adapt it.

**Describe alternatives you've considered**
N/A

**Additional context**
N/A