Rename call forwarding related constants

Renaming and moving based on API council feedback

Bug: 169153246
Test: atest TelephonyManagerTest
Change-Id: I2d597d8a516a7b4f004ab8788392c4fc6aa5e4ed
Merged-In: I2d597d8a516a7b4f004ab8788392c4fc6aa5e4ed
1 file changed