Make the default tuner HAL to be a dynamic AIDL

Add lazy tuner service.
Refine code to allow Tuner reference count to be 0 when no one uses it.

Bug: 236002754
Test: atest VtsHalTvTunerTargetTest on both lazy and normal HALs
Test: atest android.media.tv.tuner.cts on both lazy and normal HALs
Change-Id: I0cc69fe8ffd79a66db00cb72d212c222130629b5
diff --git a/tv/tuner/aidl/default/Demux.cpp b/tv/tuner/aidl/default/Demux.cpp
index a94b4ad..60fd899 100644
--- a/tv/tuner/aidl/default/Demux.cpp
+++ b/tv/tuner/aidl/default/Demux.cpp
@@ -37,6 +37,7 @@
 }
 
 Demux::~Demux() {
+    ALOGV("%s", __FUNCTION__);
     close();
 }
 
@@ -180,7 +181,10 @@
     mRecordFilterIds.clear();
     mFilters.clear();
     mLastUsedFilterId = -1;
-    mTuner->removeDemux(mDemuxId);
+    if (mTuner != nullptr) {
+        mTuner->removeDemux(mDemuxId);
+        mTuner = nullptr;
+    }
 
     return ::ndk::ScopedAStatus::ok();
 }