More file functions in libcuttlefish_utils

Move RemoveFile from the launcher to the library.
Add FileExists.

Bug: none
Test: local
Change-Id: I9033e0dbc9bc88e5326bca559eb1ef9c21a0694e
3 files changed
tree: 3477bf29433ffa85db2ae3a13059847444fc2b5e
  1. common/
  2. guest/
  3. host/
  4. tests/
  5. tools/
  6. Android.bp
  7. Android.mk
  8. OWNERS