fix error --core-android when using google api libs

pom.xml

 <dependency>
      <groupId>com.google.http-client</groupId>
      <artifactId>google-http-client</artifactId>
      <version>1.16.0-rc</version>
      <exclusions>
        <exclusion>
          <artifactId>xpp3</artifactId>
          <groupId>xpp3</groupId>
        </exclusion>
        <exclusion>
          <artifactId>httpclient</artifactId>
          <groupId>org.apache.httpcomponents</groupId>
        </exclusion>
        <exclusion>
          <artifactId>junit</artifactId>
          <groupId>junit</groupId>
        </exclusion>
        <exclusion>
          <artifactId>android</artifactId>
          <groupId>com.google.android</groupId>
        </exclusion>
      </exclusions>
    </dependency>