update current session on session start after deleting previous session

[marandaneto]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

update current session on session start after deleting the previous session.

💡 Motivation and Context

when starting a new session, if there's a leftover session, we end it and start a new one, even in this case, we should flush the new session to the current session file.

💚 How did you test it?

📝 Checklist

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

🔮 Next steps

[marandaneto]

at this point the leftover session and its current session file already became a new envelope file to be sent, so deleting it as the new session will take place.

[bruno-garcia]

👍

[codecov-io]

Codecov Report

Merging #362 into master will decrease coverage by 0.06%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master     #362      +/-   ##
============================================
- Coverage     58.95%   58.89%   -0.07%     
+ Complexity      759      758       -1     
============================================
  Files            87       87              
  Lines          3538     3540       +2     
  Branches        340      341       +1     
============================================
- Hits           2086     2085       -1     
- Misses         1301     1302       +1     
- Partials        151      153       +2     

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/io/sentry/core/cache/SessionCache.java	55.13% <0.00%> (-0.61%)	23.00 <0.00> (ø)
...c/main/java/io/sentry/core/DirectoryProcessor.java	67.34% <0.00%> (-2.05%)	7.00% <0.00%> (-1.00%)

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