Simplify experiment segment name validation
am: 9b5e650955

Change-Id: I2a9288232a30867d24bb1d564983acc767efddfa
tree: af25c513c331b52110f5749175c36214acae1289
  1. .clang-format
  2. Android.bp
  3. OWNERS
  4. PREUPLOAD.cfg
  5. disaster_recovery/
  6. libflags/