Initial commit for the HIDL Context Hub HAL

Initial commit for the context hub Hal. At this point it is
largely a refactoring of the older HAL with some new abstractions.

Test: Make completes successfully
Change-Id: Ieac4b20403e6e0b3966a4f5570fbbba7151e783b
diff --git a/contexthub/Android.bp b/contexthub/Android.bp
new file mode 100644
index 0000000..bbb3e4b
--- /dev/null
+++ b/contexthub/Android.bp
@@ -0,0 +1,4 @@
+// This is an autogenerated file, do not edit.
+subdirs = [
+    "1.0",
+]