Fixing some of the top issues from the Market console:

- Not trying to show dialogs if activity is going away
- Properly handling when the user doesn't select an account
- Handling unwritable database (due to memory full?)
- Handling NPE from fusion tables upload
- Not trying to touch dialogs when we're about to restart the whole app

SignalStrengthSamplerTest/default.properties

@@ -0,0 +1,11 @@
+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+#
+# This file must be checked in Version Control Systems.
+#
+# To customize properties used by the Ant build system use,
+# "build.properties", and override values to adapt the script to your
+# project structure.
+
+# Project target.
+target=Google Inc.:Google APIs:11