Fix ApkActionsBuilder.java on Windows

resource_extractor needs PATH to be set on Windows, otherwise it throws:

Traceback (most recent call last):
  File "C:\Program Files\Anaconda3\lib\site.py", line 570, in <module>
    main()
  File "C:\Program Files\Anaconda3\lib\site.py", line 561, in main
    os.environ["PATH"])
  File "C:\Program Files\Anaconda3\lib\os.py", line 725, in __getitem__
    raise KeyError(key) from None
KeyError: 'PATH'
Target //tensorflow/contrib/lite/examples/android:tflite_demo failed to build

Working towards: #4148

RELNOTES: None.
PiperOrigin-RevId: 211324206

src/main/java/com/google/devtools/build/lib/rules/android/ApkActionsBuilder.java

@@ -326,6 +326,7 @@ private void buildApk(RuleContext ruleContext, Artifact outApk) {
                       .addExecPath(javaResourceZip)
                       .addExecPath(extractedJavaResourceZip)
                       .build())
+              .useDefaultShellEnvironment()
               .build(ruleContext));
 
       if (ruleContext.getFragment(AndroidConfiguration.class).compressJavaResources()) {