[PT17.5] Revert to booleans for send/not send broadcast constants.

In PT17, for security of the patch these two constants have been
switched from boolean to enum values. While this is nice for making
sure a patch is correct, it's also pretty wasteful. Now that it's
certain that the values of these fields don't matter, they can be
set to logical values (as opposed to reversed as it was the case
before PT17.

Test: runtest
Change-Id: I93a0780e23c2f658687be066dc16f27529baaa86
diff --git a/services/core/java/com/android/server/connectivity/ProxyTracker.java b/services/core/java/com/android/server/connectivity/ProxyTracker.java
index a671287..e715890 100644
--- a/services/core/java/com/android/server/connectivity/ProxyTracker.java
+++ b/services/core/java/com/android/server/connectivity/ProxyTracker.java
@@ -208,8 +208,7 @@
     public void sendProxyBroadcast() {
         final ProxyInfo defaultProxy = getDefaultProxy();
         final ProxyInfo proxyInfo = null != defaultProxy ? defaultProxy : new ProxyInfo("", 0, "");
-        if (mPacManager.setCurrentProxyScriptUrl(proxyInfo)
-                == PacManager.ToSendOrNotToSendBroadcast.DONT_SEND_BROADCAST) {
+        if (mPacManager.setCurrentProxyScriptUrl(proxyInfo) == PacManager.DONT_SEND_BROADCAST) {
             return;
         }
         if (DBG) Slog.d(TAG, "sending Proxy Broadcast for " + proxyInfo);