[FEATURE REQUEST] Take advantage of the search_min_lenght capability

[nero002]

Related Issues

App:

• Add changelog files for the fixed issues in folder changelog/unreleased. More info here
• Add feature to Release Notes in ReleaseNotesViewModel.kt creating a new ReleaseNote() with String resources (if required)

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Description

• Make files_sharing.search_min_lenght drive the minimum typed characters required before running user/member searches.
• Apply this to file/folder sharing user search and space member search.
• Keep the default value at 3 when the capability is not provided.

QA

1. ./gradlew :owncloudComLibrary:testDebugUnitTest --tests "*CapabilityResponseTest" :owncloudDomain:testDebugUnitTest --tests "*OCCapabilityTest"
2. ./gradlew :owncloudApp:compileOriginalDebugKotlin
3. Manual: verify share/member search starts only after the configured capability threshold.
4. Manual: verify fallback threshold is 3 when capability is absent.
5. Manual: verify the new release note item appears in the What's New screen.

[CLAassistant]

All committers have signed the CLA.

[nero002]

@jesmrec can you please review

[jesmrec]

@nero002 first of all thanks for your contribution. @joragua will review your code and give you feedback and change proposals, after that, i will review it in terms of QA. Keep tuned.