Fix #3536: Merged home_activity.xml files

[mukulasija]

##Merged 3 home_activity xml files into single xml file
Fix #3536
Just deleted 2 of the 3 home_activity files because after comparing in text compare I found that not a single character was different in all three files and also added the layout_height parameter in dimen file.

Following are the before and after screenshots:

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[mukulasija]

@rt4910 PTAL

[BenHenning]

Hi. As of today, some main reviewers have taken time off for the next few weeks, so it may take a little while before we can look at this PR. We appreciate your patience while some of our team members recharge. We'll be fully returning on 4 January 2021.

[Arjupta]

@mukulasija nice the chabges looks good to me.

[oppiabot]

Assigning @rt4914 for code owner reviews. Thanks!

[oppiabot]

Hi @mukulasija, I'm going to mark this PR as stale because it hasn't had any updates for 7 days. If no further activity occurs within 7 days, it will be automatically closed so that others can take up the issue.
If you are still working on this PR, please make a follow-up commit within 3 days (and submit it for review, if applicable). Please also let us know if you are stuck so we can help you!

[Arjupta]

@mukulasija do resolve conflicts and update your PR so that it can be merged soon.

[rt4914]

@mukulasija Thanks. One nit change suggested.

Also please update the title of this PR to:
Fix #3536: Merged home_activity.xml files

[rt4914]

LGTM, thanks.