Support car-mode UI in telecom.

Add additional step to look for and bind to a car-mode UI if the device
is currently in car-mode. Add a system state component to listen for
car-mode changes.

Change-Id: I5124b46f43b47bda39cf3d0f882378cf69b0505b
diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
index 4576690..f84a545 100644
--- a/tests/AndroidManifest.xml
+++ b/tests/AndroidManifest.xml
@@ -47,8 +47,8 @@
         adb shell am instrument -w com.android.server.telecom.tests/android.test.InstrumentationTestRunner
 
         To run a single test case:
-        adb shell am instrument -w com.android.server.telecom.tests/android.test.InstrumentationTestRunner
-                                -e com.android.server.telecom.tests.unit.FooUnitTest
+        adb shell am instrument -w -e class com.android.server.telecom.tests.unit.FooUnitTest \
+                               com.android.server.telecom.tests/android.test.InstrumentationTestRunner
     -->
     <instrumentation android:name="android.test.InstrumentationTestRunner"
             android:targetPackage="com.android.server.telecom.tests"