GATT Server queuing

This code is mostly contribution from Qualcomm. There were some classes
renamed, and reformatting. Keeping original author of the contribution.

Test: compilation
Change-Id: I9246a072224edc711379438eefa9ac2757de0ace
diff --git a/system/bta/Android.bp b/system/bta/Android.bp
index 03a35f9..28ebb28 100644
--- a/system/bta/Android.bp
+++ b/system/bta/Android.bp
@@ -83,6 +83,7 @@
         "gatt/bta_gatts_act.cc",
         "gatt/bta_gatts_api.cc",
         "gatt/bta_gatts_main.cc",
+        "gatt/bta_gatts_queue.cc",
         "gatt/bta_gatts_utils.cc",
         "gatt/database.cc",
         "gatt/database_builder.cc",