Make LenaPi usable on Android devices

- Add app icon
- prevend android device from shutting down cpu while playing music
- fix scaling bug
- fix energy saver for RasPi by reconnecting to music player
- minor refactorings and renaming

LenaPi/LenaPi.pro

@@ -1,12 +1,16 @@
 TEMPLATE = app
-
+linux:android {
+QT += androidextras
+ANDROID_PERMISSIONS += android.permission.WAKE_LOCK
+ANDROID_PACKAGE_SOURCE_DIR = $$PWD/android-files
+QMAKE_CXXFLAGS += -DANDROID=1
+}
 QT += qml quick multimedia
 CONFIG += c++11
 LIBS +=
-ANDROID_PACKAGE_SOURCE_DIR = $$PWD/android-files
 SOURCES += main.cpp \
     controllers/MusicPlayer.cpp \
-    controllers/StyleController.cpp \
+    controllers/StyleHandling.cpp \
     models/NavigationListModel.cpp \
     models/NavigationItemModel.cpp \
     controllers/NavigationController.cpp \
@@ -42,7 +46,7 @@ else: unix:!android: target.path = /opt/$${TARGET}/bin
 
 HEADERS += \
     controllers/MusicPlayer.h \
-    controllers/StyleController.h \
+    controllers/StyleHandling.h \
     models/MusicPlayer.h \
     models/NavigationListModel.h \
     models/NavigationItemModel.h \