Delete events generated by Android application running in debug mode

[nya-elimu]

Delete learning events and assessments events reported by Applications with packageName ending with .debug.

This will avoid the problem of usage data being mixed between the development environment and test environment.

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Relates to https://github.com/elimu-ai/analytics/commit/58e5333d8f17357e8827ab1530018f205e95c3e9#diff-f55be4fcea223713ebf50735d42a6c57b2d7fabbc27c56398e0fa19011394d59R38