limit TelecomManager#registerPhoneAccount to 10

bug: 209814693
Bug: 217934478
Test: CTS
Change-Id: I3042a3973dd0dcc8d2fdc96c23d6d41522dc00af
Merged-In: I3042a3973dd0dcc8d2fdc96c23d6d41522dc00af
1 file changed