Remove ProxyInfo(String) and update callers to use ProxyInfo(Uri)

Update all callers to use ProxyInfo(Uri) and remove ProxyInfo(String).

Bug: 160557668
Test: build pass
      atest FrameworksNetTests

Change-Id: I4c980764c8839c48acf03208bb68cd53eb910121

core/java/android/net/ProxyInfo.java

@@ -126,18 +126,6 @@ public class ProxyInfo implements Parcelable {
         mPacFileUrl = pacFileUrl;
     }
 
-    /**
-     * Create a ProxyProperties that points at a PAC URL.
-     * @hide
-     */
-    public ProxyInfo(String pacFileUrl) {
-        mHost = LOCAL_HOST;
-        mPort = LOCAL_PORT;
-        mExclusionList = LOCAL_EXCL_LIST;
-        mParsedExclusionList = parseExclusionList(mExclusionList);
-        mPacFileUrl = Uri.parse(pacFileUrl);
-    }
-
     /**
      * Only used in PacManager after Local Proxy is bound.
      * @hide

services/core/java/com/android/server/connectivity/ProxyTracker.java

@@ -157,7 +157,7 @@ public class ProxyTracker {
         if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) {
             ProxyInfo proxyProperties;
             if (!TextUtils.isEmpty(pacFileUrl)) {
-                proxyProperties = new ProxyInfo(pacFileUrl);
+                proxyProperties = new ProxyInfo(Uri.parse(pacFileUrl));
             } else {
                 proxyProperties = new ProxyInfo(host, port, exclList);
             }