Oboe Examples: write_sine_threaded

These will eventually be moved to a separate repo.

Bug: 33347409
Test: these are examples that also serve as tests

Change-Id: I4c2330bb2490f55305cebcd9d3cbdfa26ee837a1
Signed-off-by: Phil Burk <philburk@google.com>
diff --git a/media/liboboe/examples/Android.mk b/media/liboboe/examples/Android.mk
new file mode 100644
index 0000000..5053e7d
--- /dev/null
+++ b/media/liboboe/examples/Android.mk
@@ -0,0 +1 @@
+include $(call all-subdir-makefiles)