Add timeout units to Javadoc comments

[noah-livio]

Fixes #1775

This PR is ready for review.

Risk

This PR makes no API changes.

Testing Plan

• I have verified that I have not introduced new warnings in this PR (or explain why below)
• I have run the unit tests with this PR - N/A
• I have tested this PR against Core and verified behavior (if applicable, if not applicable, explain why below).
• I have tested Android, Java SE, and Java EE

Unit Tests

N/A - This PR only changes documentation, not runnable code.

Core Tests

N/A - This PR only changes documentation, not runnable code.

Core version / branch / commit hash / module tested against: N/A
HMI name / version / branch / commit hash / module tested against: N/A

Summary

This PR adds the units (milliseconds) to the Javadoc comments related to timeouts in ScrollableMessage

Changelog

Breaking Changes

• None

Enhancements

• Better documentation

Bug Fixes

• Fixes ScrollableMessage.timeout units should be specified in documentation #1775

Tasks Remaining:

• None

CLA

• I have signed the CLA

[bilal-alsharifi]

It seems that the Slider RPC is also missing timeout unit

[noah-livio]

Fixes #1775

This PR is ready for review.

Risk

This PR makes no API changes.

Testing Plan

• I have verified that I have not introduced new warnings in this PR (or explain why below)
• I have run the unit tests with this PR - N/A
• I have tested this PR against Core and verified behavior (if applicable, if not applicable, explain why below).
• I have tested Android, Java SE, and Java EE

Unit Tests

N/A - This PR only changes documentation, not runnable code.

Core Tests

N/A - This PR only changes documentation, not runnable code.

Core version / branch / commit hash / module tested against: N/A
HMI name / version / branch / commit hash / module tested against: N/A

Summary

This PR adds the units (milliseconds) to the Javadoc comments related to timeouts in ScrollableMessage and Slider classes

Changelog

Breaking Changes

• None

Enhancements

• Better documentation

Bug Fixes

• Fixes ScrollableMessage.timeout units should be specified in documentation #1775

Tasks Remaining:

• None

CLA

• I have signed the CLA

[codecov]

Codecov Report

Merging #1778 (ab50c0e) into develop (b2b1e59) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #1778      +/-   ##
=============================================
- Coverage      54.36%   54.33%   -0.04%     
+ Complexity      5509     5507       -2     
=============================================
  Files            562      562              
  Lines          25516    25516              
  Branches        3319     3319              
=============================================
- Hits           13873    13865       -8     
- Misses         10384    10392       +8     
  Partials        1259     1259              

Impacted Files	Coverage Δ
...m/smartdevicelink/proxy/rpc/ScrollableMessage.java	84.21% <ø> (ø)
...ain/java/com/smartdevicelink/proxy/rpc/Slider.java	81.48% <ø> (ø)
...rtdevicelink/streaming/video/SdlRemoteDisplay.java	45.12% <0.00%> (-7.32%)	⬇️
...nk/managers/audio/AudioDecoderCompatOperation.java	75.00% <0.00%> (-4.55%)	⬇️