Android - Add missing researcher event 'Hide Transcript'

Description

http://edx.readthedocs.io/projects/devdata/en/latest/internal_data_formats/tracking_logs.html#hide-transcript-edx-video-transcript-hidden

According to the research events, we are supposed to be emitting the "Hide Transcript". This is not being emitted currently.

Acceptance Criteria:

cc

Steps to Reproduce

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Reason for Variance

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Release Notes

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Assignee

Christopher Lee

Reporter

Christopher Lee

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URL

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Groups with Read-Only Access

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Actual Points

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Reach

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Impact

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Open edX Discourse Thread

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Platform Map Area (Levels 1 & 2)

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Platform Map Area (Levels 3 & 4)

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Blended Project Status Page

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Epic Link

Sprint

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Priority

CAT-2
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