Update prepopulated search engine parameters for PrivacyWall

PrivacyWall requested to update their assets (tracked in
crbug.com/1100408). This CL makes corresponding changes.

BUG=1100408
R=orinj@chromium.org

Change-Id: I3e410933c3996fff795ac6230e9bd17e644686a1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2285871Reviewed-by: Orin Jaworski <orinj@chromium.org>
Reviewed-by: Pavel Yatsuk <pavely@chromium.org>
Commit-Queue: Pavel Yatsuk <pavely@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786139}

components/search_engines/prepopulated_engines.json

@@ -954,9 +954,9 @@
     "privacywall": {
       "name": "PrivacyWall",
       "keyword": "privacywall.org",
-      "favicon_url": "https://www.privacywall.org/images/favicon32.ico",
+      "favicon_url": "https://www.privacywall.org/images/favicon_32x32.ico",
       "search_url": "https://www.privacywall.org/search/secure/?q={searchTerms}",
-      "suggest_url": "https://www.privacywall.org/search/suggest.php?q={searchTerms}",
+      "suggest_url": "https://search.privacywall.org/suggest.php?q={searchTerms}",
       "type": "SEARCH_ENGINE_PRIVACYWALL",
       "id": 100
     },