Use an original text for next force 7bit encoding

If config_sms_force_7bit_encoding is true, an original text will be
translated based on 7-bit ASCII table for CDMA. But if the translated
text can not be encoded as single-part SMS, the original text should be
used for next try instead and it will be translated based on GSM 7-bit
alphabet for ENCODING_GSM_7BIT_ALPHABET.

Bug: 151061215
Test: Manual

Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>
Change-Id: I679786b96d19c6f3f30ec3e2037221110f5d3f84