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/.qmake.stash

@@ -0,0 +1,24 @@
+QMAKE_CXX.QT_COMPILER_STDCXX = 201402L
+QMAKE_CXX.QMAKE_GCC_MAJOR_VERSION = 10
+QMAKE_CXX.QMAKE_GCC_MINOR_VERSION = 2
+QMAKE_CXX.QMAKE_GCC_PATCH_VERSION = 1
+QMAKE_CXX.COMPILER_MACROS = \
+    QT_COMPILER_STDCXX \
+    QMAKE_GCC_MAJOR_VERSION \
+    QMAKE_GCC_MINOR_VERSION \
+    QMAKE_GCC_PATCH_VERSION
+QMAKE_CXX.INCDIRS = \
+    /usr/arm-linux-gnueabihf/include/c++/10 \
+    /usr/arm-linux-gnueabihf/include/c++/10/arm-linux-gnueabihf \
+    /usr/arm-linux-gnueabihf/include/c++/10/backward \
+    /usr/lib/gcc-cross/arm-linux-gnueabihf/10/include \
+    /usr/arm-linux-gnueabihf/include \
+    /usr/include/arm-linux-gnueabihf \
+    /usr/include
+QMAKE_CXX.LIBDIRS = \
+    /usr/lib/gcc-cross/arm-linux-gnueabihf/10 \
+    /usr/arm-linux-gnueabihf/lib \
+    /lib/arm-linux-gnueabihf \
+    /lib \
+    /usr/lib/arm-linux-gnueabihf \
+    /usr/lib