Investigate possibility of exposing sensor data using shared buffer

[alexshalamov]

For performance sensitive applications that may require data at high rates, it can be beneficial to provide data via e.g., SharedArrayBuffer

This can be beneficial for use cases, such as:

• WebGL
• WebAssembly
• Worklets
• Sensor fusion algorithms

This might eliminate inefficient task scheduling / throttling on main js thread. Maybe reporting / updating operations can be split or improved.

[anssiko]

Thanks for starting this important discussion. It might be we can close #98 and #153 as a result of this investigation.

Cc @surma for feedback who recently wrote a related blog post: 2018: 120fps and no jank.

[anssiko]

@flagxor, this issue is a follow-up to our wasm and sensors discussion at TPAC.