Forcing portrait orientation when device is "upside=down"

On my Sony Tablet S, what the device thinks is "right side up" is the exact opposite of what _I_ think is right side up. Consequently, using this setting for an activity:

```
android:screenOrientation="portrait"
```

causes the activity to appear upside-down to me. But simply changing the manifest to use:

```
android:screenOrientation="sensorPortrait"
```

instead will fix the problem. It will still force the activity in portrait mode, but allows the device to be used "upside-down" as well.

Inspect the Android activity manifest declarations related to screen orientation. Verify the current portrait setting and change it to the sensor-aware portrait behavior described in the issue; done means the activity remains portrait while allowing upside-down use on affected devices.

Written by the indexing model from the issue text.