[PwdCheckAndroid] Fix bridge destruction

The native pointer was set to 0 before calling a method on it.

Bug: 1102025
Change-Id: I55bb0d60c02c70620738784f07d1c7764f63598e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2346430Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796409}

chrome/browser/password_check/android/internal/java/src/org/chromium/chrome/browser/password_check/PasswordCheckBridge.java

@@ -142,8 +142,8 @@ class PasswordCheckBridge {
      */
     void destroy() {
         if (mNativePasswordCheckBridge != 0) {
-            mNativePasswordCheckBridge = 0;
             PasswordCheckBridgeJni.get().destroy(mNativePasswordCheckBridge);
+            mNativePasswordCheckBridge = 0;
         }
     }