Add @Nullable annotation to the parameter of Object.equals() methods.

Those annotations could be inferred by some tools (like Kotlin), but the
https://checkerframework.org/ doesn't check inherited annotations
complaining about all equals() invocations that get nullable argument.

The change was generated by running

find . -name \*.java | xargs sed -i 's/public boolean equals(Object /public boolean equals(@Nullable Object /'

in the frameworks/base directory and by automatically adding and
formatting required imports if needed. No manual edits.

Bug: 170883422
Test: Annotation change only. Should have not impact.
Exempt-From-Owner-Approval: Mechanical change not specific to any component.
Change-Id: I5eedb571c9d78862115dfdc5dae1cf2a35343580

1 files changed, 1 insertions, 1 deletions

diff --git a/core/java/android/util/ArraySet.java b/core/java/android/util/ArraySet.java
index 7f652ba2cd3a..f53548a41177 100644
--- a/core/java/android/util/ArraySet.java
+++ b/core/java/android/util/ArraySet.java
@@ -778,7 +778,7 @@ public final class ArraySet<E> implements Collection<E>, Set<E> {
      * returns true.
      */
     @Override
-    public boolean equals(Object object) {
+    public boolean equals(@Nullable Object object) {
         if (this == object) {
             return true;
         }