Reland^2 "Target Java 17"

This reverts commit 91ba6c7e01e03bde6e2f24b6d093603391149ae7.

Reason for revert: Relanding Java 17

Change-Id: I6d0e64bb86b9f4a0f41baa33c3226c6316718456
diff --git a/java/sdk.go b/java/sdk.go
index b0da5af..10ae3f6 100644
--- a/java/sdk.go
+++ b/java/sdk.go
@@ -57,14 +57,10 @@
 		return JAVA_VERSION_8
 	} else if sdk.FinalOrFutureInt() <= 31 {
 		return JAVA_VERSION_9
-	} else if ctx.Config().TargetsJava17() {
-		// Temporary experimental flag to be able to try and build with
-		// java version 17 options.  The flag, if used, just sets Java
-		// 17 as the default version, leaving any components that
-		// target an older version intact.
-		return JAVA_VERSION_17
-	} else {
+	} else if sdk.FinalOrFutureInt() <= 32 {
 		return JAVA_VERSION_11
+	} else {
+		return JAVA_VERSION_17
 	}
 }