Make message list more compact

[antodc]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Somewhat related with #215, my impression is that the message list has too much vertical 'wasted' space. I would suggest to make it more similar to the call history of the Phone App. In my phone I can see 8 conversations, whereas in the call history I can see 11 items.
More specifically, I think (at least) the following three changes might be considered:

1. Reduce the vertical empty space between two items
2. Reduce the font size of the first line (contact name or phone number). It seems to me unnecessarily larger than in the phone call list.
3. Put the time/date of the conversation on the right of first line, so to reduce from three to two the number of lines for each conversation.

Why do you want this feature?

To have more information on the screen

Additional information

No response

[Aga-C]

Related issue: #110.

[naveensingh]

Made it as compact as possible while still following the material specs. Screenshots in #558.