8141652: Rename methods Objects.nonNullElse* to requireNonNullElse*
Summary: And some usages of replacing expr != null ? expr : otherexpr
Reviewed-by: jrose, chegar

8138963: java.lang.Objects new method to default to non-null
Summary: add java.util.Object.nonNullElse and nonNullElseGet
Reviewed-by: dfuchs, jrose, psandoz, smarks, igerasim, chegar

8014365: Restore Objects.requireNonNull(T, Supplier<String>)
Reviewed-by: mduigou

8013712: Add Objects.nonNull and Objects.isNull
Reviewed-by: mchung, darcy

8012343: Objects.requireNonNull(Object,Supplier) breaks genstubs build
Reviewed-by: alanb

8011800: Add java.util.Objects.requireNonNull(T, Supplier<String>)
Reviewed-by: alanb, dholmes, mduigou

7033660: Update copyright year to 2011 on any files changed in 2011
Reviewed-by: dholmes

7012540: java.util.Objects.nonNull() incorrectly named
Reviewed-by: darcy, weijun

6943119: Rebrand source copyright notices
Reviewed-by: darcy, weijun

6891113: More methods for java.util.Objects: deepEquals, hash, toString with default
Reviewed-by: alanb, gafter

6889858: Add nonNull methods to java.util.Objects
Reviewed-by: darcy
Contributed-by: jjb@google.com

6797535: Add shared two argument static equals method to the platform
Reviewed-by: sherman