Use default class loader when creating a LocationRequest from Parcel.

This seems to be the standard usage, and there are rare reports of
requestLocationUpdates giving NullPointerExceptions on the first call
to requestLocationUpdates but not on subsequent calls (b/10207898).

Change-Id: If7a873fba5a2cd77b836ff3fda89105da20104ac

location/java/android/location/LocationRequest.java

@@ -564,7 +564,7 @@ public final class LocationRequest implements Parcelable {
             request.setHideFromAppOps(in.readInt() != 0);
             String provider = in.readString();
             if (provider != null) request.setProvider(provider);
-            WorkSource workSource = in.readParcelable(WorkSource.class.getClassLoader());
+            WorkSource workSource = in.readParcelable(null);
             if (workSource != null) request.setWorkSource(workSource);
             return request;
         }