add guava classes

Author: diegomarquezp

gax-java/gax/src/main/resources/META-INF/native-image/com.google.api/gax/native-image.properties

@@ -4,6 +4,9 @@ Args = --enable-url-protocols=https,http \
   com.google.api.gax.core.GaxProperties,\
   com.google.common.base.Platform,\
   com.google.common.base.Platform$JdkPatternCompiler,\
+  com.google.common.collect.ImmutableMapEntry,\
+  com.google.common.collect.ImmutableMapEntry$NonTerminalImmutableMapEntry,\
+  com.google.common.collect.SingletonImmutableBiMap,\
   com.google.protobuf.RuntimeVersion,\
   com.google.protobuf.RuntimeVersion$RuntimeDomain \
   --features=com.google.api.gax.nativeimage.OpenCensusFeature,\