sw: make these public, they will be needed in unit tests

And they have the Sw prefix already, so should be no issue.

Change-Id: Ibbce389de83b462028dbcf338e5ce277f102d791
CppunitTest_sw_uiwriter: add testcase for ImportRTF()

Change-Id: I334b21532337c1895a148c949dde60ad774b4759