When an issue is reported, save the unplayable formats/key-systesm in a pref,
keyed by the detailed issue string id, and report the infobar-shown telemetry.
More telemetry when the "Show me how" button is clicked.
And final telemetry (and clearing the prefs) when the issue is solved.
MozReview-Commit-ID: 4PgaPMVfjsQ
This means we'll only show the EME UI for keysystems that are explicitly turned
on in the build config, or those that are enabled after the build via prefs.
MozReview-Commit-ID: 7VTp1BJSZFy
This means we'll only show the EME UI for keysystems that are explicitly turned
on in the build config, or those that are enabled after the build via prefs.
MozReview-Commit-ID: 7VTp1BJSZFy