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Useful for its updater, we now can use an actor instead of the old
handler hack

Oreo refuses the subscription of implicit broadcasts via the app
manifest

Close #408

Force file deletion if ContentResolver throws SecurityException

This reverts commit cdd659e8.

peekLast was not returning the correct list

This reverts commit 4f4d12c7.

Close #445

Close #425

Some specific implementations (like ArrayList and HashMap) were used
were the corresponding interfaces (List and Map) could fit.

As a consequence, it was not possible to use other implementations,
like that of Collections.EMPTY_LIST or Arrays.asList(…).

Therefore, use List or Map as apparent type where appropriate.

These changes only target the VLC app, not LibVLC.
Signed-off-by: Geoffrey Métais <geoffrey.metais@gmail.com>