Changes

V1.2: EuiccResultData.setFallbackAttribute / unsetFallbackAttribute

Add setFallbackAttribute and unsetFallbackAttribute to EuiccResultData.

The IoT eUICC emulation just acknowledges the operation with a log
message and does nothing. A non IoT eUICC does not support fallback.

Reference: SGP.32 Section 2.11.1.1.3

Related: SYS#8101
Change-Id: I59fba32cb12de22f71b3238adcbab5fc7f66e991