Orientation change in Memory Graph.

[AkshobhyaP]

Describe the bug
On changing the orientation in relax activity it returns to the default memory graph. The content in Statistics and Spectrum in landscape view is also not visible completely.A Recycler view must be implemented to show the complete content. Also the UI is inconsistent as statistics have white background instead of purple.

Expected Behaviour
State change needs to be handled and the whole content should be visible.

Steps to reproduce it
Open the Memory graph activity -> change to landscape orientation

Screenshots of the issue

System Information

Device	Oneplus 3
Android version/OS	Pie 9.0

Would you like to work on the issue?
Yes.