Android: Move AndroidExtraLibraryListModel to base

Instead of having the full class build-system dependent,
by relying on four more AndroidQtSupport functions for now.

Change-Id: I26842f3ec70b875ba4481ae36d8c85f86366cb88
Reviewed-by: Vikas Pachdha <vikas.pachdha@qt.io>

src/plugins/android/android.pro

@@ -53,7 +53,8 @@ HEADERS += \
     androidsdkpackage.h \
     androidsdkmodel.h \
     androidsdkmanagerwidget.h \
-    androidpackageinstallationstep.h
+    androidpackageinstallationstep.h \
+    androidextralibrarylistmodel.h
 
 SOURCES += \
     androidconfigurations.cpp \
@@ -100,7 +101,8 @@ SOURCES += \
     androidsdkpackage.cpp \
     androidsdkmodel.cpp \
     androidsdkmanagerwidget.cpp \
-    androidpackageinstallationstep.cpp
+    androidpackageinstallationstep.cpp \
+    androidextralibrarylistmodel.cpp
 
 FORMS += \
     androidsettingswidget.ui \