StringReader import was removed

Author: MukjepScarlet

gson/src/main/java/com/google/gson/JsonParser.java

@@ -22,6 +22,7 @@
 import com.google.gson.stream.MalformedJsonException;
 import java.io.IOException;
 import java.io.Reader;
+import java.io.StringReader;
 
 /**
  * A parser to parse JSON into a parse tree of {@link JsonElement}s.

gson/src/main/java/com/google/gson/JsonStreamParser.java

@@ -21,6 +21,7 @@
 import com.google.gson.stream.MalformedJsonException;
 import java.io.IOException;
 import java.io.Reader;
+import java.io.StringReader;
 import java.util.Iterator;
 import java.util.NoSuchElementException;
 

gson/src/main/java/com/google/gson/TypeAdapter.java

@@ -24,6 +24,7 @@
 import com.google.gson.stream.JsonWriter;
 import java.io.IOException;
 import java.io.Reader;
+import java.io.StringReader;
 import java.io.Writer;
 
 /**