Give all android megazord classes the same name, removing the need for reflection

megazords/fenix/android/src/main/java/mozilla/appservices/Megazord.kt

@@ -4,7 +4,7 @@
 
 package mozilla.appservices
 
-class FenixMegazord {
+class Megazord {
     companion object {
         @JvmStatic
         fun init() {

megazords/lockbox/android/src/main/java/mozilla/appservices/Megazord.kt

@@ -4,7 +4,7 @@
 
 package mozilla.appservices
 
-class LockboxMegazord {
+class Megazord {
     companion object {
         @JvmStatic
         fun init() {

megazords/reference-browser/android/src/main/java/mozilla/appservices/Megazord.kt

@@ -4,7 +4,7 @@
 
 package mozilla.appservices
 
-class ReferenceBrowserMegazord {
+class Megazord {
     companion object {
         @JvmStatic
         fun init() {