[android_device] Fix for OTA test unable to start logcat exception

OTA fails as start_services() in ota_runner#update() throws 'failed to
start logcat' exception since reboot() alredy started logcat.

Return from start_adb_logcat() instead of raising excpetion when adb is
already running. Similar change for stop_adb_logcat()

Bug: 110476161
Test: Verified the changes
Change-Id: I3b858c86402cb80a3966645837eaef04141e67d8
1 file changed
tree: 4af3d35667a92350724087a30564f3cc1c06519c
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. PREUPLOAD.cfg