Fix build aar instructions (#49265)

packages/flutter_tools/lib/src/android/gradle.dart

@@ -620,7 +620,7 @@ ${globals.terminal.bolden('Consuming the Module')}
 
   for (final String buildMode in buildModes) {
     globals.printStatus('''
-      ${buildMode}Implementation '$androidPackage:flutter_$buildMode:$buildNumber''');
+      ${buildMode}Implementation \'$androidPackage:flutter_$buildMode:$buildNumber\'''');
   }
 
   globals.printStatus('''

packages/flutter_tools/test/general.shard/android/gradle_test.dart

@@ -1852,9 +1852,9 @@ plugin1=${plugin1.path}
           '  3. Make the host app depend on the Flutter module:\n'
           '\n'
           '    dependencies {\n'
-          '      releaseImplementation \'com.mycompany:flutter_release:2.2\n'
-          '      debugImplementation \'com.mycompany:flutter_debug:2.2\n'
-          '      profileImplementation \'com.mycompany:flutter_profile:2.2\n'
+          '      releaseImplementation \'com.mycompany:flutter_release:2.2\'\n'
+          '      debugImplementation \'com.mycompany:flutter_debug:2.2\'\n'
+          '      profileImplementation \'com.mycompany:flutter_profile:2.2\'\n'
           '    }\n'
           '\n'
           '\n'
@@ -1904,7 +1904,7 @@ plugin1=${plugin1.path}
           '  3. Make the host app depend on the Flutter module:\n'
           '\n'
           '    dependencies {\n'
-          '      releaseImplementation \'com.mycompany:flutter_release:1.0\n'
+          '      releaseImplementation \'com.mycompany:flutter_release:1.0\'\n'
           '    }\n'
           '\n'
           'To learn more, visit https://flutter.dev/go/build-aar\n'
@@ -1943,7 +1943,7 @@ plugin1=${plugin1.path}
           '  3. Make the host app depend on the Flutter module:\n'
           '\n'
           '    dependencies {\n'
-          '      debugImplementation \'com.mycompany:flutter_debug:1.0\n'
+          '      debugImplementation \'com.mycompany:flutter_debug:1.0\'\n'
           '    }\n'
           '\n'
           'To learn more, visit https://flutter.dev/go/build-aar\n'
@@ -1983,7 +1983,7 @@ plugin1=${plugin1.path}
           '  3. Make the host app depend on the Flutter module:\n'
           '\n'
           '    dependencies {\n'
-          '      profileImplementation \'com.mycompany:flutter_profile:1.0\n'
+          '      profileImplementation \'com.mycompany:flutter_profile:1.0\'\n'
           '    }\n'
           '\n'
           '\n'