Fix google-explicit-constructor warnings in minikin

* Add explicit keyword to conversion constructors,
  or add NOLINT(implicit) for implicit converters.
Bug: 28341362
Test: build with WITH_TIDY=1

Change-Id: I0c7b90f9bb953a9f2e4f0fb2032fa65ac604b9ca
Merged-In: I0c7b90f9bb953a9f2e4f0fb2032fa65ac604b9ca
2 files changed
tree: 729b6ebd9913d308a3eb00901c8735753fffd9e8
  1. app/
  2. doc/
  3. include/
  4. libs/
  5. sample/
  6. tools/