feat: support enable and disable SDK

[zhu-xiaowei]

• PR title and description conform to Pull Request guidelines.

Description of changes:

1. support enable and disable SDK.

How did you test these changes?
Added test cases for timer, activity lifecycle, application lifecycle and exception handlers, which will be disabled when the SDK is disabled

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (c1ac692) 86.57% compared to head (229f3b6) 86.91%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #46      +/-   ##
============================================
+ Coverage     86.57%   86.91%   +0.33%     
- Complexity      405      414       +9     
============================================
  Files            39       39              
  Lines          1453     1467      +14     
  Branches        129      129              
============================================
+ Hits           1258     1275      +17     
+ Misses          123      121       -2     
+ Partials         72       71       -1     

Files	Coverage Δ
...aws/solution/clickstream/AWSClickstreamPlugin.java	84.09% <100.00%> (+0.36%)	⬆️
...solution/clickstream/ActivityLifecycleManager.java	98.07% <100.00%> (+0.03%)	⬆️
...aws/solution/clickstream/ClickstreamAnalytics.java	80.64% <100.00%> (+6.57%)	⬆️
...olution/clickstream/client/ClickstreamManager.java	86.66% <100.00%> (+9.74%)	⬆️
...lickstream/client/ClickstreamExceptionHandler.java	62.74% <70.96%> (+2.32%)	⬆️

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