Don't crash on remote read error, just return

Change-Id: I35a2af255f55e008d64142ed0eceb6e83473d630
diff --git a/media/libmedia/IMediaHTTPConnection.cpp b/media/libmedia/IMediaHTTPConnection.cpp
index 22c470a..7e26ee6 100644
--- a/media/libmedia/IMediaHTTPConnection.cpp
+++ b/media/libmedia/IMediaHTTPConnection.cpp
@@ -95,7 +95,10 @@
         data.writeInt32(size);
 
         status_t err = remote()->transact(READ_AT, data, &reply);
-        CHECK_EQ(err, (status_t)OK);
+        if (err != OK) {
+            ALOGE("remote readAt failed");
+            return UNKNOWN_ERROR;
+        }
 
         int32_t exceptionCode = reply.readExceptionCode();