Type Allocation Code & Manufacturer Code

- Addition of getTypeAllocationCode & getManufacturerCode to
android.telephony.TelephonyManager.

- The Type Allocation Code is the first eight characters of the IMEI.
The Type Allocation Code identifies a particular GSM device model.

- The Manufacturer Code is the first eight characters of the MEID.
The Manufacturer Code identifies the manufacturer of a CDMA device.

- The reasoning behind adding getTypeAllocationCode is to be
able to obtain the Type Allocation Code without requiring the
READ_PHONE_STATE permission. Currently in order to obtain the
Type Allocation Code a substring operation must be performed on
getImei which is protected by the READ_PHONE_STATE permission.

- The reasoning behind adding getManufacturerCode is to be
able to obtain the Manufacturer Code without requiring the
READ_PHONE_STATE permission. Currently in order to obtain the
Manufacturer Code a substring operation must be performed on
getMeid which is protected by the READ_PHONE_STATE permission.

- The reasoning that these additional methods do not require the
READ_PHONE_STATE permission is that neither the Type Allocation
Code nor the Manufacturer Code can identify a unique device.
The Type Allocation Code and the Manufacturer Code are analogous
to other device information such as device model or device
screen dimensions.

Test: run cts -m CtsTelephonyTestCases
Bug: 74613795
Change-Id: I5a586b5a362b39aae13357329efb19eb93f0434c
Signed-off-by: David Kelly <dkelly@afilias.info>