Update CONTRIBUTING.md

Closes #1378 
Fixes corona-warn-app/cwa-documentation#439

* Update README.md

* Update README.md

Merge hotfix 1.3.1 to master

* Align TestFragment Crash behavior with background transaction crash behavior.

* Add logging mechanism to debug hotfix issue.

* Lint Resolvement, Nav Graph Issue clean, Enable Log for deviceForTesters, Correct Quota Tests due to now lacking exception

Co-authored-by: Matthias Urhahn <matthias.urhahn@sap.com>
Co-authored-by: d067928 <jakob.moeller@sap.com>

* Fix: No exposure with low risk so far

* Fixed klint issues (#1144)

* restored reverted replaced wording for lint

* https://github.com/corona-warn-app/cwa-app-android/pull/1153#discussion_r487801724

* fixed term

Throw Exception in case we have a failed entry to ensure Abortion of the Transaction (EXPOSUREAPP-2405) (#1134)

* Throw Exception in case we have a failed entry to ensure Abortion of the Transaction.

Signed-off-by: d067928 <jakob.moeller@sap.com>

* Adjust test to not expect call to clear cache files

Signed-off-by: d067928 <jakob.moeller@sap.com>

Change-Id: Ib76a9ea2b03163a05dd8b6acf2179262f9bcf5bf

Signed-off-by: d067928 <jakob.moeller@sap.com>

* Remove Cache Clearing to reduce CDN load on failing devices. This ideally needs to be accompanied by a way to clear the cache manually and a way to identify more root causes of Transaction Failures.

Signed-off-by: d067928 <jakob.moeller@sap.com>

* Remove Files that failed for Key Retrieval

Only Remove Files from Cache that failed to download, instead of every file. This is accompanied ideally by no rollback in the Key Retrieval. We only delete the cache ref, the file will not be deleted as it is considered not present

Signed-off-by: d067928 <jakob.moeller@sap.com>

* Introduce dedicated QuotaCalculator for Unit Testing

Signed-off-by: d067928 <jakob.moeller@sap.com>

* Refactor QuotaCalculator for LocalData Property Access and Write Tests

Signed-off-by: d067928 <jakob.moeller@sap.com>

* Use Instant on the Device Read since this is not timezone specific

Signed-off-by: d067928 <jakob.moeller@sap.com>

* Add specific state for the quota calculation and dedicated rollback

Signed-off-by: d067928 <jakob.moeller@sap.com>

* PR Comments

Signed-off-by: d067928 <jakob.moeller@sap.com>

* + new strings

* let the app not crash on other languages than DE

* values for lint and tests

* made bad test a comment

* removed unnecessary strings

* more string fixes

Co-authored-by: Jakob Möller <jakob.moeller@sap.com>
Co-authored-by: Luka Harambasic <luka.harambasic@sap.com>

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>
Co-authored-by: Jakob Möller <jakob.moeller@sap.com>

RC/1.3.0 to Master

Dev 1.3.0 to RC/1.3.0

Change-Id: I8af48ed2340554e341fb3c86b03111171ed06212

* Resetting the preferences deletes our database encryption credentials, but we don't delete the database itself.
On app restart, there is a mismatch between the newly generated credentials and the old database.

* Include dependency 'androidx.annotation'.
The previous commit accidentally used the transitive dependency from google-utils.

Co-authored-by: Matthias Urhahn <matthias.urhahn@sap.com>
Co-authored-by: Jakob Möller <jakob.moeller@sap.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>

* No submission possible (EXPOSUREAPP-1742)

1. sets the LocalData values to emulate jey submission.

* Logic improvement after code review

* WorkSchedular stopped after submission

* Improved logic

* pipeline fix - removed unused import

* logic simplified based on review

Co-authored-by: Jakob Möller <jakob.moeller@sap.com>

* changed text for invalid qr code

* changed text for delete test

* Refactored method

* Normalized interval pairs.

* Perfoming additional check for from date

* Removed changes from build.gradle

* Fixed lint errors

Co-authored-by: Jakob Möller <jakob.moeller@sap.com>

# Conflicts:
#	Corona-Warn-App/build.gradle

* initial commit : feature / fix complete

1. Formatter Added
2. include layout added
3. visilbity logic based on default device language has been added
4. links for english and german forms are added based on device language
5. phone number has been removed

* simplified logic

* logic improved - more robust null check

* reverted unnecessary string changes & added "information_legal_subtitle_contact_form_non_en_de" to german as non translatable

Co-authored-by: Luka Harambasic <luka.harambasic@sap.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>

1. Onboarding and About fragments are added with the easy language texts

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>

Dev 1.3.0 to RC/1.3.0

- not trigger a Dummy Playbook for 1% of all clients
- not repeating the playbook pattern for up to 16 days
- not trigger 1-3 repetitions for each communication to CWA/VS

Hotfix 1.2.1

Dev 1.3.0 to RC/1.3.0