Risk change dialog pops up after being dismissed (EXPOSUREAPP-3536)

[SamuraiKek]

Description

This PR fixes a bug where the LiveData from the VM wasn't getting updated anymore, causing a dialog to show up every time you traveled to another screen and then returned.
Issue was caused by LiveData being filtered and once it had a value, the filter was ignoring any other state the LiveData could be in.

How to quickly test:

In RiskLevelTransaction, comment out the start() function and replace it with this one:

suspend fun start() = lockAndExecute(
        scope = transactionScope,
        timeout = RISK_LEVEL_TRANSACTION_TIMEOUT
    ) {
        lastCalculatedRiskLevelScoreForRollback.set(RiskLevelRepository.getLastCalculatedScore())
        executeUpdateRiskLevelScore(INCREASED_RISK)
        executeRiskLevelCalculationDateUpdate()
        executeClose()
        return@lockAndExecute
    }

• Build & run the app with the "hacked" version of the start function to put the app in a high risk state.
• Change the INCREASED_RISK to LOW_LEVEL_RISK in executeUpdateRiskLevelScore() and build & run again.
• App should display the dialog with the low risk card in the background.
• Pressing Ok on the dialog dismisses the dialog.
• Navigating to a different screen and returning to the home screen won't result in a new dialog being displayed.

[AlexanderAlferov]

Tested with steps in PR description.
Smoke tested.
lgtm

[BMItr]

Code looks clean to me and good to read 👌

[harambasicluka]

lgtm, but I think the Project.xml shouldn't be part this PR.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

0.0% Coverage
0.0% Duplication