WP-4923 Stop using the deprecated stream

[dustyholmes-wf]

This was causing two problems:

1. If store is a mock this fails due to an argument error unless the mock is configured to return a stream for store.stream
2. stream is deprecated and should not be used, plus it is only visible for testing.

With this, a mocked store now needs to stub listen rather than stream.

[aviary-wf]

Raven

Number of Findings: 0

[dustyholmes-wf]

@Workiva/web-platform-pp

[codecov-io]

Codecov Report

Merging #100 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #100   +/-   ##
=======================================
  Coverage   96.77%   96.77%           
=======================================
  Files           5        5           
  Lines          62       62           
=======================================
  Hits           60       60           
  Misses          2        2

Impacted Files	Coverage Δ
lib/src/component_common.dart	92.3% <100%> (ø)	⬆️

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[trentgrover-wf]

@jayudey-wf ready for you + release

[maxwellpeterson-wf]

+10

• CI passes

[maxwellpeterson-wf]

QA +1

• Dev +1's
• Dev/QA +10 with detail of what was tested
• Tests created/updated
  • Existing tests cover change
• All tests pass

@Workiva/release-management-pp

[rmconsole-wf]

+1 from RM