Update native functions to match signature in platform plugin

We just pass 1.0 as the scaled density for now, since it shouldn't
make much different to the code being tested.

Task-number: QTBUG-32079
Change-Id: I888c4640e4627f47a2c128d2ce2a41adf4ca3132
Reviewed-by: BogDan Vatra <bogdan@kde.org>
Make sure main application library is loaded

We need to also load the binary for the application itself.

Task-number: QTBUG-32079
Change-Id: Ic26d5e6d950d6d18aaa54392c3c84b6deaa56c75
Reviewed-by: BogDan Vatra <bogdan@kde.org>
Make sure activity is closed

If we don't call finish() before crashing the activity, then
the Activity Manager will just restart it.

Task-number: QTBUG-32079
Change-Id: I09623afe545c3f4e8b9be801ccfbe244059b270e
Reviewed-by: BogDan Vatra <bogdan@kde.org>
Make sure libgnustl_shared.so is deployed along with Qt libs

Since configure no longer puts this in $QTDIR/lib, we need to
copy it from the NDK and into the device ourselves.

Task-number: QTBUG-32079
Change-Id: I75ee5f8a00de9a1ba536bcfd857e6b2e7a0e1f6e
Reviewed-by: BogDan Vatra <bogdan@kde.org>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>