format operator== according to flutter style guide (#48449)

diff --git a/packages/flutter_tools/lib/src/asset.dart b/packages/flutter_tools/lib/src/asset.dart
index d1a4706..79b0694 100644
--- a/packages/flutter_tools/lib/src/asset.dart
+++ b/packages/flutter_tools/lib/src/asset.dart

@@ -283,7 +283,7 @@
   String toString() => 'asset: $entryUri';
 
   @override
-  bool operator ==(dynamic other) {
+  bool operator ==(Object other) {
     if (identical(other, this)) {
       return true;
     }

diff --git a/packages/flutter_tools/lib/src/base/fingerprint.dart b/packages/flutter_tools/lib/src/base/fingerprint.dart
index 9ef80c7..45549ea 100644
--- a/packages/flutter_tools/lib/src/base/fingerprint.dart
+++ b/packages/flutter_tools/lib/src/base/fingerprint.dart

@@ -140,7 +140,7 @@
   });
 
   @override
-  bool operator==(dynamic other) {
+  bool operator==(Object other) {
     if (identical(other, this)) {
       return true;
     }

diff --git a/packages/flutter_tools/lib/src/base/version.dart b/packages/flutter_tools/lib/src/base/version.dart
index e89772c..04a91fe 100644
--- a/packages/flutter_tools/lib/src/base/version.dart
+++ b/packages/flutter_tools/lib/src/base/version.dart

@@ -84,11 +84,11 @@
   /// Two [Version]s are equal if their version numbers are. The version text
   /// is ignored.
   @override
-  bool operator ==(dynamic other) {
-    if (other is! Version) {
-      return false;
-    }
-    return major == other.major && minor == other.minor && patch == other.patch;
+  bool operator ==(Object other) {
+    return other is Version
+        && other.major == major
+        && other.minor == minor
+        && other.patch == patch;
   }
 
   @override

diff --git a/packages/flutter_tools/lib/src/device.dart b/packages/flutter_tools/lib/src/device.dart
index 9109845..debd75a 100644
--- a/packages/flutter_tools/lib/src/device.dart
+++ b/packages/flutter_tools/lib/src/device.dart

@@ -440,14 +440,12 @@
   int get hashCode => id.hashCode;
 
   @override
-  bool operator ==(dynamic other) {
+  bool operator ==(Object other) {
     if (identical(this, other)) {
       return true;
     }
-    if (other is! Device) {
-      return false;
-    }
-    return id == other.id;
+    return other is Device
+        && other.id == id;
   }
 
   @override

diff --git a/packages/flutter_tools/lib/src/emulator.dart b/packages/flutter_tools/lib/src/emulator.dart
index 3cfcac6..7a91410 100644
--- a/packages/flutter_tools/lib/src/emulator.dart
+++ b/packages/flutter_tools/lib/src/emulator.dart

@@ -228,14 +228,12 @@
   int get hashCode => id.hashCode;
 
   @override
-  bool operator ==(dynamic other) {
+  bool operator ==(Object other) {
     if (identical(this, other)) {
       return true;
     }
-    if (other is! Emulator) {
-      return false;
-    }
-    return id == other.id;
+    return other is Emulator
+        && other.id == id;
   }
 
   Future<void> launch();