mark as current thread if its the main thread

[marandaneto]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

💡 Motivation and Context

mark as the current thread if its the main thread, right now dashboard only shows was active=no.

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• All tests passing

🔮 Next steps

[codecov-io]

Codecov Report

Merging #228 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #228   +/-   ##
=========================================
  Coverage     58.96%   58.96%           
  Complexity      569      569           
=========================================
  Files            72       72           
  Lines          2644     2644           
  Branches        235      235           
=========================================
  Hits           1559     1559           
  Misses          970      970           
  Partials        115      115

Impacted Files	Coverage Δ	Complexity Δ
...ntry-core/src/main/java/io/sentry/core/Sentry.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...re/src/main/java/io/sentry/core/ISentryClient.java	86.66% <ø> (ø)	7 <0> (ø)	⬇️
sentry-core/src/main/java/io/sentry/core/IHub.java	81.81% <ø> (ø)	5 <0> (ø)	⬇️

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