Change the CBD dialog on Android to a PreferenceFragment

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index cbaaf07fd88047076d1d00f56599a9add82bece8..5e61140fd15713804938325e2a13537e18e23857 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -418,6 +418,12 @@ For example, some websites may respond to this request by showing you ads that a
       <message name="IDS_CLEAR_BROWSING_DATA_TITLE" desc="Button to Clear Browsing Data [CHAR-LIMIT=24]">
         Clear browsing data
       </message>
+      <message name="IDS_CLEAR_BROWSING_DATA_FOOTNOTE" desc="A summary string at the bottom of the Clear Browsing Data dialog, informing the user that not all data can be cleared through this dialog.">
+        Some settings that may reflect browsing habits will not be cleared.
+      </message>
+      <message name="IDS_CLEAR_BROWSING_DATA_FOOTNOTE_SYNCED" desc="A summary string at the bottom of the Clear Browsing Data dialog, informing the user that synced data types are deleted across devices, and that not all data can be cleared through this dialog.">
+        This clears synced data from all devices. Some settings that may reflect browsing habits will not be cleared.
+      </message>
       <message name="IDS_CLEAR_CACHE_TITLE" desc="Title for Clear Cache in Clear Browsing Data dialog">
         Cache
       </message>