Sunset v3.16 and warn for 3.19.4 (#8634)

~~I may be able to follow up with some deletion of older code~~ (maybe
not, because there's just gating for using `ToolEventStream` and I don't
think there's alternative code for it; just no functionality pre-3.7)

Author: helin24

src/io/flutter/sdk/FlutterSdkVersion.java

@@ -26,11 +26,11 @@ public final class FlutterSdkVersion implements Comparable<FlutterSdkVersion> {
    * Note, this is for the Flutter SDK version, not the Dart SDK version, this mapping can be found:
    * <a href="https://docs.flutter.dev/release/archive">Flutter SDK Release Archive list</a>.
    * <p>
-   * This version was updated last on June 24, 2025.
+   * This version was updated last on December 5, 2025.
    */
   @VisibleForTesting
   @NotNull
-  public static final FlutterSdkVersion MIN_SDK_SUPPORTED = new FlutterSdkVersion("3.13");
+  public static final FlutterSdkVersion MIN_SDK_SUPPORTED = new FlutterSdkVersion("3.16");
 
   /**
    * The minimum version of the Flutter SDK that will be supported for 3 more months. A version less than this is either not supported or
@@ -39,11 +39,11 @@ public final class FlutterSdkVersion implements Comparable<FlutterSdkVersion> {
    * Note, this is for the Flutter SDK version, not the Dart SDK version, this mapping can be found:
    * <a href="https://docs.flutter.dev/release/archive">Flutter SDK Release Archive list</a>.
    * <p>
-   * This version was updated last on June 24, 2025.
+   * This version was updated last on December 5, 2025.
    */
   @VisibleForTesting
   @NotNull
-  public static final FlutterSdkVersion MIN_SDK_WITHOUT_SUNSET_WARNING = new FlutterSdkVersion("3.16");
+  public static final FlutterSdkVersion MIN_SDK_WITHOUT_SUNSET_WARNING = new FlutterSdkVersion("3.19.4");
 
   @NotNull
   private static final FlutterSdkVersion MIN_SUPPORTS_TOOL_EVENT_STREAM = new FlutterSdkVersion("3.7.1");

testSrc/unit/io/flutter/sdk/FlutterSdkVersionTest.java

@@ -18,43 +18,18 @@ public void parsesGoodVersion() {
 
   @Test
   public void trackSdkVersionSupport() {
-    assertFalse(new FlutterSdkVersion("3.9.0").isSDKSupported());
-    assertFalse(new FlutterSdkVersion("3.9.0").isSDKSupported());
-    assertFalse(new FlutterSdkVersion("3.9.0.pre").isSDKSupported());
-    assertFalse(new FlutterSdkVersion( "3.10.0.pre").isSDKSupported());
-    assertFalse(new FlutterSdkVersion( "3.10.1").isSDKSupported());
-    assertFalse(new FlutterSdkVersion( "3.10.2").isSDKSupported());
-    assertFalse(new FlutterSdkVersion( "3.10.3").isSDKSupported());
-    assertFalse(new FlutterSdkVersion( "3.10.4").isSDKSupported());
-    assertFalse(new FlutterSdkVersion("3.10.3").isSDKSupported());
-    assertFalse(new FlutterSdkVersion("3.10.4").isSDKSupported());
-    assertFalse(new FlutterSdkVersion("3.10.5").isSDKSupported());
-    assertFalse(new FlutterSdkVersion("3.10.6").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.0").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.1").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.2").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.3").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.4").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.5").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.6").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.7").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.8").isSDKSupported());
-    assertTrue(new FlutterSdkVersion("3.13.9").isSDKSupported());
-    assertFalse(new FlutterSdkVersion( "unknown").isSDKSupported());
+    assertFalse(new FlutterSdkVersion("3.15.0").isSDKSupported());
+    assertFalse(new FlutterSdkVersion("3.16.0-0.1.pre").isSDKSupported());
+    assertTrue(new FlutterSdkVersion("3.16.0").isSDKSupported());
+    assertTrue(new FlutterSdkVersion("3.16.1").isSDKSupported());
+    assertTrue(new FlutterSdkVersion("3.17.0").isSDKSupported());
+    assertFalse(new FlutterSdkVersion("unknown").isSDKSupported());
 
-    assertTrue(new FlutterSdkVersion("3.13.0").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.1").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.2").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.3").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.4").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.5").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.6").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.7").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.8").isSDKAboutToSunset());
-    assertTrue(new FlutterSdkVersion("3.13.9").isSDKAboutToSunset());
-    assertFalse(new FlutterSdkVersion("3.16.0").isSDKAboutToSunset());
-    assertFalse(new FlutterSdkVersion("3.16.1").isSDKAboutToSunset());
-    assertFalse(new FlutterSdkVersion("3.16.2").isSDKAboutToSunset());
+    assertTrue(new FlutterSdkVersion("3.16.0").isSDKAboutToSunset());
+    assertTrue(new FlutterSdkVersion("3.17.0").isSDKAboutToSunset());
+    assertTrue(new FlutterSdkVersion("3.19.3").isSDKAboutToSunset());
+    assertFalse(new FlutterSdkVersion("3.19.4").isSDKAboutToSunset());
+    assertFalse(new FlutterSdkVersion("3.20.0").isSDKAboutToSunset());
   }
 
   @Test