Remove all sample-based Cue methods

[Holzhaus]

Based on #4049. This changes the Cue API to use frame positions.

Prerequisite PRs:

• AnalyzerSilence: Use mixxx::audio::FramePos in storeResults() #4074
• DlgTrackInfo: Use mixxx::audio::FramePos in slots #4075
• AutoDJProcessor: Return mixxx::audio::FramePos from DeckAttributes #4076
• EnginePrimeExportJob: Use mixxx::audio::FramePos internally #4077
• RekordboxFeature: Use mixxx::audio::FramePos internally #4078
• VinylControlControl: Use mixxx::audio::FramePos internally #4079
• BaseTrackPlayer: Use mixxx::audio::FramePos internally #4080
• CueControl: Use mixxx::audio::FramePos internally #4081
• test: Use mixxx::audio::FramePos in AnalyzerSilenceTest #4082
• test: Use mixxx::audio::FramePos in CueControlTest/HotcueControlTest #4083

This is extremely weird. Only the last commit is of interest (the other ones are part of other PRs). That last commit makes a bunch of test cases time out, and I have no idea why.

EDIT The commit seems to cause an endless loop in Track::setCuePointsWhileLocked. Investigating.

EDIT 2 Looks like I'm not the brightest candle on the cake:

    double toEngineSamplePosMaybeInvalid() const {
        if (!isValid()) {
            return kLegacyInvalidEnginePosition;
        }
        return toEngineSamplePosMaybeInvalid();
    }

No wonder there is an endless loop :)

EDIT 3 Fixed.

[coveralls]

Pull Request Test Coverage Report for Build 1020805526

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 28.643%

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Totals
Change from base Build 1019395588:	0.004%
Covered Lines:	20099
Relevant Lines:	70170

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💛 - Coveralls

[uklotzde]

👍 LGTM

[LeDucDuBleuet]

Currently AutoDJ crashes Mixxx completely with a segfault when using "Enable random track addition to queue". It started crashing with this commit or the ones referred to in the first comment I believe a couple days after committing #4041...

Let me know if we need to file a new bug on Launchpad. Thx

[Be-ing]

That is unrelated to this PR, please report a bug on Launchpad.

[LeDucDuBleuet]

@Be-ing Thanks for the quick reply, I opened one : https://bugs.launchpad.net/mixxx/+bug/1936396