Don't display footer text when calling app is DPC.

If the calling app has admin rights (DA/DO/PO), don't display footer
text that the calling app is 'recommending' that a password is set.

Fixes: 131888973
Test: atest com.android.settings.password.SetNewPasswordActivityTest --verbose
Test: atest com.android.settings.password.ChooseLockGenericTest --verbose
Test: manual
Change-Id: I32785d33e6425416fc1dbba24540ece8917b58f3