tp: move QueryResultSerializer header to include/ext

This CL moves the header for the QueryResultSerializer class from src to
include/ext. This is necessary to depend on this class in BigTrace in
G3.

Change-Id: I5f37fc46498d4f7555de042f0280103552f5e576
diff --git a/Android.bp b/Android.bp
index 08bc177..081ab9b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1956,6 +1956,11 @@
     name: "perfetto_include_perfetto_ext_trace_processor_importers_memory_tracker_memory_tracker",
 }
 
+// GN: //include/perfetto/ext/trace_processor/rpc:query_result_serializer
+filegroup {
+    name: "perfetto_include_perfetto_ext_trace_processor_rpc_query_result_serializer",
+}
+
 // GN: //include/perfetto/ext/traced:sys_stats_counters
 filegroup {
     name: "perfetto_include_perfetto_ext_traced_sys_stats_counters",
@@ -12351,6 +12356,7 @@
         ":perfetto_include_perfetto_ext_trace_processor_demangle",
         ":perfetto_include_perfetto_ext_trace_processor_export_json",
         ":perfetto_include_perfetto_ext_trace_processor_importers_memory_tracker_memory_tracker",
+        ":perfetto_include_perfetto_ext_trace_processor_rpc_query_result_serializer",
         ":perfetto_include_perfetto_ext_traced_sys_stats_counters",
         ":perfetto_include_perfetto_ext_traced_traced",
         ":perfetto_include_perfetto_ext_tracing_core_core",
@@ -13201,6 +13207,7 @@
         ":perfetto_include_perfetto_ext_trace_processor_demangle",
         ":perfetto_include_perfetto_ext_trace_processor_export_json",
         ":perfetto_include_perfetto_ext_trace_processor_importers_memory_tracker_memory_tracker",
+        ":perfetto_include_perfetto_ext_trace_processor_rpc_query_result_serializer",
         ":perfetto_include_perfetto_ext_traced_sys_stats_counters",
         ":perfetto_include_perfetto_protozero_protozero",
         ":perfetto_include_perfetto_public_abi_base",