Report the correct version for the RTDB (#605)

Author: schmidt-sebastian

firebase-database/CHANGELOG.md

@@ -1,4 +1,8 @@
-# Unreleased
+# 18.0.1
+- [changed] The SDK now reports the correct version number (via
+  `FirebaseDatabase.getSdkVersion()`).
+
+# 17.0.0
 - [changed] Added `@RestrictTo` annotations to discourage the use of APIs that
   are not public. This affects internal APIs that were previously obfuscated
   and are not mentioned in our documentation.

firebase-database/src/main/java/com/google/firebase/database/FirebaseDatabase.java

@@ -38,7 +38,7 @@
 @PublicApi
 public class FirebaseDatabase {
 
-  private static final String SDK_VERSION = "3.0.0";
+  private static final String SDK_VERSION = BuildConfig.VERSION_NAME;
 
   private final FirebaseApp app;
   private final RepoInfo repoInfo;