Show Save document dialog when using colorpicker

on Android Viewer
Signed-off-by: Mert Tumer <merttumer@outlook.com>

Change-Id: I4e46e9a4aeba991e19e85f177a8031bcecf4b9c3
Reviewed-on: https://gerrit.libreoffice.org/58370
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

android/source/src/java/org/libreoffice/ColorPaletteAdapter.java

@@ -49,6 +49,7 @@ public class ColorPaletteAdapter extends RecyclerView.Adapter<ColorPaletteAdapte
         holder.colorBox.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
+                LibreOfficeMainActivity.setDocumentChanged(true);
                 setPosition(holder.getAdapterPosition());
             }
         });

android/source/src/java/org/libreoffice/ColorPickerAdapter.java

@@ -50,6 +50,7 @@ public class ColorPickerAdapter extends RecyclerView.Adapter<ColorPickerAdapter.
         holder.colorBox.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
+                LibreOfficeMainActivity.setDocumentChanged(true);
                 setPosition(holder.getAdapterPosition());
                 colorPaletteListener.applyColor(colorList[holder.getAdapterPosition()]);
             }