Remove empty primary constructor (#124)

* Remove empty primary constructor

* Update pubspec.yaml

* Update CHANGELOG.md

Co-authored-by: creativecreatorormaybenot <creativecreatorormaybenot@gmail.com>

+## 0.5.3+2
+
+* Removed empty constructor in Android code.
+
 ## 0.5.3+1
 
 * Addded mavenCentral to Gradle build.

@@ -38,4 +38,4 @@ internal class Wakelock {
   }
 }
 
-class NoActivityException() : Exception("wakelock requires a foreground activity")
+class NoActivityException : Exception("wakelock requires a foreground activity")

@@ -2,7 +2,7 @@ name: wakelock
 description: >-2
   Plugin that allows you to keep the device screen awake, i.e. prevent the screen from sleeping on
   Android, iOS, macOS, Windows, and web.
-version: 0.5.3+1
+version: 0.5.3+2
 homepage: https://github.com/creativecreatorormaybenot/wakelock/tree/master/wakelock
 
 environment: