Fix name of sensor-graph module.

Apparently include fails silently, so this was just absent from the
build.

The warning flag change is only needed now because we weren't previously
building non-default (debug) configurations. Now we are, and that
problem has always been present.

sensor-graph/accelerometer/src/main/cpp/CMakeLists.txt

@@ -1,6 +1,10 @@
 cmake_minimum_required(VERSION 3.4.1)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Werror")
+# TODO: Remove -Wno-unused-variable
+# That warning is ignore for now because those are release config only issues
+# caused by assert(). The fix is to migrate to CHECK/DCHECK, but that requires
+# importing absl or libbase first.
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Werror -Wno-unused-variable")
 
 add_library(accelerometergraph SHARED
             sensorgraph.cpp)

settings.gradle

@@ -55,7 +55,7 @@ include(":prefab:prefab-dependency:app")
 include(":prefab:prefab-publishing:mylibrary")
 include(":san-angeles:app")
 include(":sanitizers:app")
-include(":sensor-graph:app")
+include(":sensor-graph:accelerometer")
 include(":teapots:choreographer-30fps")
 include(":teapots:classic-teapot")
 include(":teapots:image-decoder")