Prevents an NPE when content provider is slow to start

Also, extends the client-side timeout to match that
in ActivityManagerService.

Also, fixes an ANR that could occur if getType is called for
an unknown content provider

---------------

Revert "Revert "Prevents an NPE when content provider is slow to start""

This reverts commit 3a54effffdb361ccd60169dcce93cf4e87fc6dac.

Reason for revert: Roll forward of the original CL,
  with a fix for the regression it caused

Original commit 140fc2e9c9382d5326b72ff28e8782e7bffc493d
Test: atest FrameworksCoreTests:android.content.ContentResolverTest
Fixes: 148987678

Change-Id: Ic60acceaabbf6b32c71d0b8bdf831a7d1f13d392
diff --git a/core/tests/coretests/AndroidManifest.xml b/core/tests/coretests/AndroidManifest.xml
index 59335a5..718ca46 100644
--- a/core/tests/coretests/AndroidManifest.xml
+++ b/core/tests/coretests/AndroidManifest.xml
@@ -1330,6 +1330,12 @@
             android:process=":FakeProvider">
         </provider>
 
+        <provider
+            android:name="android.content.SlowProvider"
+            android:authorities="android.content.SlowProvider"
+            android:process=":SlowProvider">
+        </provider>
+
         <!-- Application components used for os tests -->
 
         <service android:name="android.os.MessengerService"