hg: jdk/sandbox: 8226831: Use Objects.equals() when appropriate

[chris.hegarty at oracle.com]

Changeset: 82a71d82e326
Author:    igerasim
Date:      2019-08-27 14:44 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/82a71d82e326

8226831: Use Objects.equals() when appropriate
Reviewed-by: rriggs, bpb

! src/java.base/share/classes/java/net/InterfaceAddress.java
! src/java.base/share/classes/java/net/URLStreamHandler.java
! src/java.base/share/classes/java/text/AttributedString.java
! src/java.base/share/classes/java/util/TreeMap.java
! src/java.base/share/classes/java/util/TreeSet.java
! src/java.base/share/classes/sun/net/www/protocol/ftp/Handler.java
! src/java.base/share/classes/sun/security/x509/AlgorithmId.java