With this CL, you can let ThemedNavBarKeyboard call
InputMethodService#setBackDisposition(int)
with either the following values
* BACK_DISPOSITION_DEFAULT
* BACK_DISPOSITION_ADJUST_NOTHING
so that you can see how those two flags work.
Bug: 213337792
Test: Manually verified as follows
1. Flash aosp_coral-userdebug into the device
2. make -j ThemedNavBarKeyboard
3. adb install -r $ANDROID_PRODUCT_OUT/system/app/ThemedNavBarKeyboard/ThemedNavBarKeyboard.apk
4. adb shell ime enable com.example.android.themednavbarkeyboard/.ThemedNavBarKeyboard
5. adb shell ime set com.example.android.themednavbarkeyboard/.ThemedNavBarKeyboard
6. Tap any edit field
7. Make sure that the back button is left-pointing triangle
8. Tap "BACK_DISPOSITION_ADJUST_NOTHING" on the IME
9. Make sure that the back button is down-pointing triangle
Change-Id: I71aa1dd23d72e8891cb3887efe5db1a48b6a017d
Adding a new folder in development/samples is not enough to have it
be packaged with the SDK.
Make sure to edit development/build/sdk.atree to add the sample to the SDK
build.
bb7d04778d