Update properties file path in Java XSettings

[shinfan]

More context: googleapis/google-cloud-java#1863

[codecov-io]

Codecov Report

Merging #1166 into master will increase coverage by 0.05%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##             master    #1166      +/-   ##
============================================
+ Coverage     86.04%   86.09%   +0.05%     
- Complexity     3667     3687      +20     
============================================
  Files           372      372              
  Lines         14441    14553     +112     
  Branches       1612     1627      +15     
============================================
+ Hits          12426    12530     +104     
- Misses         1580     1587       +7     
- Partials        435      436       +1

Impacted Files	Coverage Δ	Complexity Δ
.../api/codegen/viewmodel/StaticLangSettingsView.java	100% <ø> (ø)	8 <0> (ø)	⬇️
...m/google/api/codegen/transformer/SurfaceNamer.java	78.47% <0%> (-1.18%)	170 <0> (+2)
.../transformer/java/JavaGapicSurfaceTransformer.java	98.88% <100%> (+0.07%)	43 <0> (ø)	⬇️
...api/codegen/transformer/java/JavaSurfaceNamer.java	85.24% <75%> (+2.22%)	30 <0> (+5)	⬆️
...main/java/com/google/api/codegen/LanguageUtil.java	31.57% <0%> (-5.27%)	4% <0%> (-1%)
...om/google/api/codegen/discovery/DefaultString.java	87.67% <0%> (-1.08%)	23% <0%> (-4%)
...java/com/google/api/codegen/DiscoveryImporter.java	90.67% <0%> (-0.6%)	62% <0%> (+2%)
.../transformer/ruby/RubyGapicSurfaceTransformer.java	100% <0%> (ø)	10% <0%> (ø)	⬇️
...codegen/viewmodel/StaticLangPagedResponseView.java	100% <0%> (ø)	2% <0%> (ø)	⬇️
... and 26 more

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[shinfan]

PTAL

[garrettjonesgoogle]

LGTM