feat(Icon): add poll and to-do-list icons to in Teams theme

[natashamayurshah]

poll:

to-do-list:

[codecov]

Codecov Report

Merging #1498 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1498      +/-   ##
==========================================
+ Coverage   73.44%   73.44%   +<.01%     
==========================================
  Files         822      824       +2     
  Lines        6190     6192       +2     
  Branches     1776     1776              
==========================================
+ Hits         4546     4548       +2     
  Misses       1639     1639              
  Partials        5        5

Impacted Files	Coverage Δ
...hemes/teams/components/Icon/svg/icons/toDoList.tsx	100% <100%> (ø)
...rc/themes/teams/components/Icon/svg/icons/poll.tsx	100% <100%> (ø)

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[codecov]

Codecov Report

Merging #1498 into master will increase coverage by 0.23%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1498      +/-   ##
==========================================
+ Coverage    73.2%   73.44%   +0.23%     
==========================================
  Files         823      824       +1     
  Lines        6221     6194      -27     
  Branches     1786     1778       -8     
==========================================
- Hits         4554     4549       -5     
+ Misses       1662     1640      -22     
  Partials        5        5

Impacted Files	Coverage Δ
...rc/themes/teams/components/Icon/svg/icons/poll.tsx	100% <100%> (ø)
...hemes/teams/components/Icon/svg/icons/toDoList.tsx	100% <100%> (ø)
packages/react/src/components/Tree/TreeItem.tsx	53.57% <0%> (-22.75%)	⬇️
packages/react/src/lib/shouldHandleOnKeys.ts	100% <0%> (ø)	⬆️
...c/lib/accessibility/Behaviors/Tree/treeBehavior.ts	100% <0%> (ø)	⬆️
.../accessibility/Behaviors/Tree/treeTitleBehavior.ts	100% <0%> (ø)	⬆️
...b/accessibility/Behaviors/Button/buttonBehavior.ts	100% <0%> (ø)	⬆️
...ssibility/Behaviors/Button/toggleButtonBehavior.ts	100% <0%> (ø)	⬆️
packages/react/src/index.ts	100% <0%> (ø)	⬆️
...ib/accessibility/Behaviors/Tree/subtreeBehavior.ts	100% <0%> (ø)	⬆️
... and 10 more

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