Add Settings[, Oberser] java code and JNI bridge.

blimp/client/core/context/blimp_client_context_impl.cc

Index: blimp/client/core/context/blimp_client_context_impl.cc
diff --git a/blimp/client/core/context/blimp_client_context_impl.cc b/blimp/client/core/context/blimp_client_context_impl.cc
index 81769e53483afa6bf70bf0211f742a2be050e0bc..4e5b1941c4d7eb510759ba2cef098fcbfa79543a 100644
--- a/blimp/client/core/context/blimp_client_context_impl.cc
+++ b/blimp/client/core/context/blimp_client_context_impl.cc
@@ -35,6 +35,7 @@
 
 #if defined(OS_ANDROID)
 #include "blimp/client/core/context/android/blimp_client_context_impl_android.h"
+#include "blimp/client/core/settings/android/settings_android.h"
 #endif  // OS_ANDROID
 
 namespace blimp {
@@ -101,7 +102,11 @@ BlimpClientContextImpl::BlimpClientContextImpl(
       blimp_compositor_dependencies_(
           base::MakeUnique<BlimpCompositorDependencies>(
               std::move(compositor_dependencies))),
+#if defined(OS_ANDROID)

[David Trainor- moved to gerrit, 2016/11/03 03:05:10]

Can we pass the settings object in the constructor and just build it in the
create calls?  Then we don't have to pass local_state in.

[Menglin, 2016/11/03 23:17:01]

yes we can do that to avoid #if in the constructor

+      settings_(base::MakeUnique<SettingsAndroid>(local_state)),
+#else
       settings_(base::MakeUnique<Settings>(local_state)),
+#endif
       blob_channel_feature_(new BlobChannelFeature(this)),
       geolocation_feature_(base::MakeUnique<GeolocationFeature>(
           base::MakeUnique<device::LocationArbitrator>(