Make sure the PAC script content is sent again

...when the PAC service crashes.

Bug: 185409199
Test: manual
Change-Id: Ic76428f42f37f8552a526190764ad32e2874adb0
diff --git a/services/core/java/com/android/server/connectivity/PacProxyService.java b/services/core/java/com/android/server/connectivity/PacProxyService.java
index d23b488..0070339 100644
--- a/services/core/java/com/android/server/connectivity/PacProxyService.java
+++ b/services/core/java/com/android/server/connectivity/PacProxyService.java
@@ -345,7 +345,14 @@
                     if (mProxyService == null) {
                         Log.e(TAG, "No proxy service");
                     } else {
-                        mNetThreadHandler.post(mPacDownloader);
+                        // If mCurrentPac is not null, then the PacService might have
+                        // crashed and restarted. The download task will not actually
+                        // call setCurrentProxyScript, so call setCurrentProxyScript here.
+                        if (mCurrentPac != null) {
+                            setCurrentProxyScript(mCurrentPac);
+                        } else {
+                            mNetThreadHandler.post(mPacDownloader);
+                        }
                     }
                 }
             }