apk_operations.py: Make logcat exit more gracefully when adb server is restarted

Bug: 1005979
Change-Id: I72bf91be86d4c800050dd5e4ec4b21ef1f0cc241
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1815655
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Liquan (Max) Gu <maxlg@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#698888}

build/android/apk_operations.py

@@ -771,7 +771,11 @@ def _RunLogcat(device, package_name, mapping_path, verbose):
       try:
         logcat_processor.ProcessLine(line, fast)
       except:
-        sys.stderr.write('Failed to process line: ' + line)
+        sys.stderr.write('Failed to process line: ' + line + '\n')
+        # Skip stack trace for the common case of the adb server being
+        # restarted.
+        if 'unexpected EOF' in line:
+          sys.exit(1)
         raise
       if fast and nonce in line:
         fast = False