feat: expose log exclusion apis

[athakor]

Fixes #158

[codecov]

Codecov Report

Merging #162 into master will increase coverage by 0.44%.
The diff coverage is 86.48%.

@@             Coverage Diff              @@
##             master     #162      +/-   ##
============================================
+ Coverage     75.17%   75.61%   +0.44%     
- Complexity      593      636      +43     
============================================
  Files            42       43       +1     
  Lines          3646     3794     +148     
  Branches        251      272      +21     
============================================
+ Hits           2741     2869     +128     
- Misses          757      767      +10     
- Partials        148      158      +10     

Impacted Files	Coverage Δ	Complexity Δ
...rc/main/java/com/google/cloud/logging/Logging.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
...om/google/cloud/logging/spi/v2/GrpcLoggingRpc.java	40.17% <0.00%> (-2.56%)	1.00 <0.00> (ø)
.../main/java/com/google/cloud/logging/Exclusion.java	86.04% <86.04%> (ø)	25.00 <25.00> (?)
...ain/java/com/google/cloud/logging/LoggingImpl.java	89.70% <98.18%> (+1.63%)	91.00 <18.00> (+18.00)

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[athakor]

@chingor13 PTAL

[elharo]

This requires a major version bump? Are you ready for that?

[athakor]

@chingor13 PTAL

[athakor]

@simonz130 @chingor13 PTAL