transcoding: add job scheduler and unit tests

bug: 145233472

Change-Id: Id0244ff553e9fa963ccc7623cc6198dfd9db2564
diff --git a/media/libmediatranscoding/tests/Android.bp b/media/libmediatranscoding/tests/Android.bp
index 8191b00..904cf9b 100644
--- a/media/libmediatranscoding/tests/Android.bp
+++ b/media/libmediatranscoding/tests/Android.bp
@@ -37,6 +37,13 @@
     srcs: ["TranscodingClientManager_tests.cpp"],
 }
 
+cc_test {
+    name: "TranscodingJobScheduler_tests",
+    defaults: ["libmediatranscoding_test_defaults"],
+
+    srcs: ["TranscodingJobScheduler_tests.cpp"],
+}
+
 //
 // AdjustableMaxPriorityQueue unit test
 //