Add Lnbs for CTS

Bug: 150952758
Test: atest android.media.tv.tuner.cts.TunerTest
Change-Id: I0e1954ceaa93c110dabc669759675834f30b9524
diff --git a/tv/tuner/1.0/default/Lnb.cpp b/tv/tuner/1.0/default/Lnb.cpp
index 51931d6..6025339 100644
--- a/tv/tuner/1.0/default/Lnb.cpp
+++ b/tv/tuner/1.0/default/Lnb.cpp
@@ -27,6 +27,9 @@
 namespace implementation {
 
 Lnb::Lnb() {}
+Lnb::Lnb(int id) {
+    mId = id;
+}
 
 Lnb::~Lnb() {}
 
@@ -66,9 +69,13 @@
     return Result::SUCCESS;
 }
 
+int Lnb::getId() {
+    return mId;
+}
+
 }  // namespace implementation
 }  // namespace V1_0
 }  // namespace tuner
 }  // namespace tv
 }  // namespace hardware
-}  // namespace android
\ No newline at end of file
+}  // namespace android