Room RxJava2 Support, Step 1

This CL adds support for returning Flowable & Publisher from
Room DAO queries. We may introduce an Optional support later
for nullable queries.

I've also changed live data check to use type utils instead of string
matching.

Bug: 37009497
Test: RxRoomTest, RxJava2Test
Change-Id: I00e10efcf7599f3d33cd7e4b6b638b546fb5c1e9
diff --git a/app-toolkit/settings.gradle b/app-toolkit/settings.gradle
index 61f2e38..a2c1b55 100644
--- a/app-toolkit/settings.gradle
+++ b/app-toolkit/settings.gradle
@@ -72,6 +72,9 @@
 include ":room:testing"
 project(':room:testing').projectDir = new File(supportRoot, "room/testing")
 
+include ":room:rxjava2"
+project(':room:rxjava2').projectDir = new File(supportRoot, "room/rxjava2")
+
 include ':room:integration-tests:testapp'
 project(':room:integration-tests:testapp').projectDir = new File(supportRoot, "room/integration-tests/testapp")