Initialize fragment_ and verbose_ fields in hiddenapi.cc

Bug: 179354495
Test: m out/soong/hiddenapi-stub-flags.csv
      - make sure that no errors or warnings about missing information
        are output when building fragments.
Merged-In: I9628dad3325c4626bdf997fac25b70898e6177b5
Change-Id: I9628dad3325c4626bdf997fac25b70898e6177b5
(cherry picked from commit 2d97dc11b72543ed2fbb7a03b063b8fd1b06fd3a)
1 file changed