Revert "CaptivePortalData: use CharSequence in VenueFriendlyName API"

This reverts commit 6ae29ff41a17ff71026f8f382417554e616be7d6.

Reason for revert: b/183174863
Bug: 183174863

Change-Id: I4db923e112bba149f4e8eb4cfa8c3f97defd5e63
diff --git a/framework/api/system-current.txt b/framework/api/system-current.txt
index 8845225..031bb91 100644
--- a/framework/api/system-current.txt
+++ b/framework/api/system-current.txt
@@ -18,7 +18,7 @@
     method public long getRefreshTimeMillis();
     method @Nullable public android.net.Uri getUserPortalUrl();
     method public int getUserPortalUrlSource();
-    method @Nullable public CharSequence getVenueFriendlyName();
+    method @Nullable public String getVenueFriendlyName();
     method @Nullable public android.net.Uri getVenueInfoUrl();
     method public int getVenueInfoUrlSource();
     method public boolean isCaptive();
@@ -40,7 +40,7 @@
     method @NonNull public android.net.CaptivePortalData.Builder setSessionExtendable(boolean);
     method @NonNull public android.net.CaptivePortalData.Builder setUserPortalUrl(@Nullable android.net.Uri);
     method @NonNull public android.net.CaptivePortalData.Builder setUserPortalUrl(@Nullable android.net.Uri, int);
-    method @NonNull public android.net.CaptivePortalData.Builder setVenueFriendlyName(@Nullable CharSequence);
+    method @NonNull public android.net.CaptivePortalData.Builder setVenueFriendlyName(@Nullable String);
     method @NonNull public android.net.CaptivePortalData.Builder setVenueInfoUrl(@Nullable android.net.Uri);
     method @NonNull public android.net.CaptivePortalData.Builder setVenueInfoUrl(@Nullable android.net.Uri, int);
   }