Picture in Picture mode issue

I am trying to implement Picture in Picture mode independent from activities. For now i have pip functionality but its activity dependent.so i want to make it activity independent and it should continue for all over the app once this available for devices.

The issue mentions existing Picture in Picture functionality but names no files, tests, or entry points. First clarify how the current activity-dependent implementation works and which devices are supported; done means Picture in Picture continues independently across the app on those devices.

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