Add emissive color to renderer

[jsm174]

This PR adds two new methods to the IMaterialConverter interface:

public void SetEmissiveColor(MaterialPropertyBlock propBlock, Color color);
public Color? GetEmissiveColor(Material material)

Currently, only HDRP supports emissive color.

When creating a new project that uses URP, when the player is activated, the lamp api will crash.

In addition to the render pipeline updates, this PR also adds support for ios-arm64.

[codecov[bot]]

Codecov Report

Merging #367 (ce41dc1) into master (fcea80a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #367   +/-   ##
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  Coverage   83.91%   83.91%           
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  Files         125      125           
  Lines        6741     6741           
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  Hits         5657     5657           
  Misses       1084     1084           

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