Do not add mimetype to url as a query parameter

Bug: 11654127

Adding mimetype to url as a query parameter is a bad practice as
it requires us to inject app specific behavior to webview. There
also seems no reason to add this, so removing.

Change-Id: Ib2e5198981f2d37128ab545a33b83e8109bf3eef
(cherry picked from commit dd44be0b2e29ee043ac8c25dba34f11b9c018c46)
diff --git a/src/com/android/htmlviewer/HTMLViewerActivity.java b/src/com/android/htmlviewer/HTMLViewerActivity.java
index 1c42441..2e46e49 100644
--- a/src/com/android/htmlviewer/HTMLViewerActivity.java
+++ b/src/com/android/htmlviewer/HTMLViewerActivity.java
@@ -103,10 +103,6 @@
                 String contentUri = "file".equals(uri.getScheme())
                         ? FileContentProvider.BASE_URI + uri.getEncodedPath()
                         : uri.toString();
-                String intentType = intent.getType();
-                if (intentType != null) {
-                    contentUri += "?" + intentType;
-                }
                 mWebView.loadUrl(contentUri);
             }
         }