FIX Lint FragmentLiveDataObserve

For environment:
- Android Studio 3.1 +
- AndroidX 1.0 +
- Support library 28.0.0 +

Refer to:
- android/architecture-components-samples#47
- https://proandroiddev.com/5-common-mistakes-when-using-architecture-components-403e9899f4cb
- https://medium.com/@BladeCoder/architecture-components-pitfalls-part-1-9300dd969808

app/src/main/java/com/davorpa/labs/androidstudio/mynavapp/ui/gallery/GalleryFragment.java

@@ -24,7 +24,7 @@ public View onCreateView(@NonNull LayoutInflater inflater,
                 ViewModelProviders.of(this).get(GalleryViewModel.class);
         View root = inflater.inflate(R.layout.fragment_gallery, container, false);
         final TextView textView = root.findViewById(R.id.text_gallery);
-        galleryViewModel.getText().observe(this, new Observer<String>() {
+        galleryViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
             @Override
             public void onChanged(@Nullable String s) {
                 textView.setText(s);

app/src/main/java/com/davorpa/labs/androidstudio/mynavapp/ui/home/HomeFragment.java

@@ -24,7 +24,7 @@ public View onCreateView(@NonNull LayoutInflater inflater,
                 ViewModelProviders.of(this).get(HomeViewModel.class);
         View root = inflater.inflate(R.layout.fragment_home, container, false);
         final TextView textView = root.findViewById(R.id.text_home);
-        homeViewModel.getText().observe(this, new Observer<String>() {
+        homeViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
             @Override
             public void onChanged(@Nullable String s) {
                 textView.setText(s);

app/src/main/java/com/davorpa/labs/androidstudio/mynavapp/ui/send/SendFragment.java

@@ -24,7 +24,7 @@ public View onCreateView(@NonNull LayoutInflater inflater,
                 ViewModelProviders.of(this).get(SendViewModel.class);
         View root = inflater.inflate(R.layout.fragment_send, container, false);
         final TextView textView = root.findViewById(R.id.text_send);
-        sendViewModel.getText().observe(this, new Observer<String>() {
+        sendViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
             @Override
             public void onChanged(@Nullable String s) {
                 textView.setText(s);

app/src/main/java/com/davorpa/labs/androidstudio/mynavapp/ui/share/ShareFragment.java

@@ -24,7 +24,7 @@ public View onCreateView(@NonNull LayoutInflater inflater,
                 ViewModelProviders.of(this).get(ShareViewModel.class);
         View root = inflater.inflate(R.layout.fragment_share, container, false);
         final TextView textView = root.findViewById(R.id.text_share);
-        shareViewModel.getText().observe(this, new Observer<String>() {
+        shareViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
             @Override
             public void onChanged(@Nullable String s) {
                 textView.setText(s);

app/src/main/java/com/davorpa/labs/androidstudio/mynavapp/ui/slideshow/SlideshowFragment.java

@@ -24,7 +24,7 @@ public View onCreateView(@NonNull LayoutInflater inflater,
                 ViewModelProviders.of(this).get(SlideshowViewModel.class);
         View root = inflater.inflate(R.layout.fragment_slideshow, container, false);
         final TextView textView = root.findViewById(R.id.text_slideshow);
-        slideshowViewModel.getText().observe(this, new Observer<String>() {
+        slideshowViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
             @Override
             public void onChanged(@Nullable String s) {
                 textView.setText(s);

app/src/main/java/com/davorpa/labs/androidstudio/mynavapp/ui/tools/ToolsFragment.java

@@ -24,7 +24,7 @@ public View onCreateView(@NonNull LayoutInflater inflater,
                 ViewModelProviders.of(this).get(ToolsViewModel.class);
         View root = inflater.inflate(R.layout.fragment_tools, container, false);
         final TextView textView = root.findViewById(R.id.text_tools);
-        toolsViewModel.getText().observe(this, new Observer<String>() {
+        toolsViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
             @Override
             public void onChanged(@Nullable String s) {
                 textView.setText(s);