Impeller was blanket-disabled on TV in e759dafa as a precaution when the
Tensor/NVIDIA fallbacks landed, and #749 (API 30 Fire TV Cube freezing
until the Skia build) validated it. Flutter has since deprecated the
Impeller opt-out, so start walking the disable back where the hardware
can take it: TV devices on Android 12+ with a Vulkan 1.1 driver use
Impeller, while Fire OS (modern API levels on GPUs whose drivers can't
back it up), pre-12 boxes, and the existing NVIDIA/Huawei/e-waste quirks
stay on Skia. Tag Sentry events with the active renderer so TV
regressions are attributable while this rolls out.
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