refactor: fix analyzer warnings

- remove uses of `FallThroughError?
- don't use `:` arg default value syntax

packages/_ardera_common_libc_bindings/lib/src/libc.dart

@@ -184,7 +184,7 @@ class epoll_event_ptr {
     } else if (Arch.isAmd64) {
       return backing.cast<amd64.epoll_event>();
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
   }
 
@@ -216,7 +216,7 @@ class epoll_event_ptr {
     } else if (Arch.isAmd64) {
       ptr = backing.cast<amd64.epoll_event_real>().elementAt(index);
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
     return epoll_event_ptr(allocator, ptr);
   }
@@ -233,7 +233,7 @@ class epoll_event_ptr {
     } else if (Arch.isAmd64) {
       return backing.cast<amd64.epoll_event_real>().ref;
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
   }
 
@@ -262,7 +262,7 @@ class epoll_event_ptr {
     } else if (Arch.isAmd64) {
       return ffi.sizeOf<amd64.epoll_event_real>();
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
   }
 
@@ -346,7 +346,7 @@ class termios_ptr {
     } else if (Arch.isAmd64) {
       return i386.NCCS;
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
   }
 
@@ -361,7 +361,7 @@ class termios_ptr {
     } else if (Arch.isAmd64) {
       ptr = backing.cast<i386.termios>().elementAt(index);
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
     return termios_ptr(allocator, ptr);
   }
@@ -376,7 +376,7 @@ class termios_ptr {
     } else if (Arch.isAmd64) {
       return backing.cast<i386.termios>().ref;
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
   }
 
@@ -404,7 +404,7 @@ class termios_ptr {
     } else if (Arch.isAmd64) {
       return ffi.sizeOf<amd64.termios>();
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported Architecture');
     }
   }
 

packages/_ardera_libc_bindings_generator/lib/src/libc_bindings_generator.dart

@@ -109,7 +109,7 @@ class LibCPlatformBackendGenerator extends Generator {
     } else if (Platform.isLinux) {
       return _linuxLlvmPath;
     } else {
-      throw FallThroughError();
+      throw UnsupportedError('Unsupported platform');
     }
   }
 

packages/flutter_gpiod_test_app/lib/main.dart

@@ -100,7 +100,7 @@ class _MyHomePageState extends State<MyHomePage> {
             ),
             Text(
               '$_counter',
-              style: Theme.of(context).textTheme.headline4,
+              style: Theme.of(context).textTheme.headlineMedium,
             ),
           ],
         ),

packages/flutterpi_gstreamer_video_player/pubspec.yaml

@@ -1,7 +1,7 @@
 name: flutterpi_gstreamer_video_player
-description: A new Flutter plugin project.
+description: video_player platform implementation for flutter-pi.
 version: 0.1.0
-homepage:
+repository: https://github.com/ardera/flutter_packages
 
 environment:
   sdk: '>=2.18.6 <3.0.0'

packages/linux_serial/lib/src/linux_serial.dart

@@ -646,7 +646,7 @@ class SerialPort {
 }
 
 abstract class StringReader {
-  factory StringReader(Stream<int> source, {Encoding encoding: utf8}) {
+  factory StringReader(Stream<int> source, {Encoding encoding = utf8}) {
     return _StringReaderImpl(source, encoding: encoding);
   }
 

packages/omxplayer_video_player/lib/src/omxplayer_video_player.dart

@@ -82,7 +82,7 @@ class OmxplayerVideoPlayer extends VideoPlayerPlatform {
   /// is mounted in the widget tree at a time.
   /// When [strictViewBehaviour] is `false`, will try to work around that issue and
   /// only actually build the platform view for the last-recently registered element.
-  static void useAsImplementation({bool strictViewBehaviour: false}) {
+  static void useAsImplementation({bool strictViewBehaviour = false}) {
     VideoPlayerPlatform.instance = OmxplayerVideoPlayer._(strictViewBehaviour);
   }