UserProfileAdapter: fix the image upload

[kamilababayeva]

Changes:

• fix the UID assign to user in Realtime database
• fix the image upload in the user search
• change the image view after the "Add" button was pressed
• fix the friends' store in database
• fix the profile_activity tests

[MaximeZmt]

👍

[codeclimate]

Code Climate has analyzed commit a2aa863 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 72.7% (80% is the threshold).

This pull request will bring the total coverage in the repository to 89.1% (1.6% change).

View more on Code Climate.

[jiabaow]

LGTM
minor remark: Would you think it will be better to put the green tick in the center (aligned with the ADD)?

[kamilababayeva]

LGTM minor remark: Would you think it will be better to put the green tick in the center (aligned with the ADD)?

I will take a look at it in the next tasks on this user search! thanks!