tools/logcat: improve handling of input encoding (#14629)

For example, avoid a decoding exception on this line:
```
20:58:28.534 14160            reader.launche  F  thread.cc:1326] Check failed: FindStackTop() > reinterpret_cast<void*>(tlsPtr_.stack_end) (FindStackTop()=X���`���X���, reinterpret_cast<void*>(tlsPtr_.stack_end)=0xbe10c000)
```

tools/logcat.py

@@ -331,6 +331,7 @@ def main():
                 stdin = sys.stdin
             else:
                 stdin = stack.enter_context(open(args.filter, 'r', encoding=encoding))
+            stdin.reconfigure(errors='replace')
         else:
             # Logcat mode.
             if args.clear: