Bug 1880805 - Handle WebSettings.databaseEnabled deprecation. r=android-reviewers,petru

Differential Revision: https://phabricator.services.mozilla.com/D217432

mobile/android/android-components/components/browser/engine-system/src/main/java/mozilla/components/browser/engine/system/SystemEngineSession.kt

@@ -282,7 +282,6 @@ class SystemEngineSession(
             // Explicitly set global defaults.
 
             cacheMode = LOAD_NO_CACHE
-            databaseEnabled = false
 
             setDeprecatedWebSettings(this)
 
@@ -305,6 +304,8 @@ class SystemEngineSession(
         webSettings.saveFormData = false
         // Deprecated in API18.
         webSettings.savePassword = false
+        // Deprecated in API35; default value is false.
+        webSettings.databaseEnabled = false
     }
 
     private fun setUseWideViewPort(settings: WebSettings, useWideViewPort: Boolean?) {