Android: Add Android tool manager

Refactor the use of android tool and groundwork for the new sdk
and avd management tool's integration

Task-number: QTCREATORBUG-17814
Change-Id: I6a5920f9ba92508f904cd8cf28bf62c82de2d820
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

src/plugins/android/android.pro

@@ -47,7 +47,8 @@ HEADERS += \
     android_global.h \
     androidbuildapkstep.h \
     androidbuildapkwidget.h \
-    androidrunnable.h
+    androidrunnable.h \
+    androidtoolmanager.h
 
 SOURCES += \
     androidconfigurations.cpp \
@@ -88,7 +89,8 @@ SOURCES += \
     androidbuildapkstep.cpp \
     androidbuildapkwidget.cpp \
     androidqtsupport.cpp \
-    androidrunnable.cpp
+    androidrunnable.cpp \
+    androidtoolmanager.cpp
 
 FORMS += \
     androidsettingswidget.ui \