Update Flipper (#29787)

Summary:
The current Flipper version included in new React Native is quite old, causing some bugs to be present which have long been solved, such as freezing the UI after inspecting it.
Fixes

This fixes #29492 /
facebook/flipper#1399

## Changelog

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[general][changed] - Update Flipper to 0.54

Pull Request resolved: #29787

Test Plan:
Updated the RN 0.63.2 based test project https://github.com/mweststrate/flipper-issue-1399-repo with `use_flipper!('Flipper' => '0.54.0')` (in `ios/Podspec`) / `FLIPPER_VERSION=0.52.1` in `gradle.properties` in the test project https://github.com/mweststrate/flipper-issue-1399-repo and verified that everything builds and connects correctly, and that the bug is no longer present.

Tried to run RN-tester project in this repo. For iOS this succeeded, on Android I got a build error:

```
make: Leaving directory '/Users/mweststrate/Desktop/react-native/ReactAndroid/src/main/jni/react/jni'
make: Entering directory '/Users/mweststrate/Desktop/react-native/ReactAndroid/src/main/jni/react/jni'
fcntl(): Bad file descriptor
[armeabi-v7a] Compile++ thumb: folly_json <= FileUtil.cpp
/Users/mweststrate/Desktop/react-native/ReactAndroid/build/third-party-ndk/folly/folly/FileUtil.cpp:37:14: error: no matching function for call to 'wrapNoInt'
make: Leaving directory '/Users/mweststrate/Desktop/react-native/ReactAndroid/src/main/jni/react/jni'
  return int(wrapNoInt(open, name, flags, mode));
             ^~~~~~~~~
/Users/mweststrate/Desktop/react-native/ReactAndroid/build/third-party-ndk/folly/folly/detail/FileUtilDetail.h:34:9: note: candidate template ignored: couldn't infer template argument 'F'
ssize_t wrapNoInt(F f, Args... args) {
        ^
1 error generated.
make: *** [/opt/android_sdk/ndk/21.3.6528147/build/core/build-binary.mk:478: /Users/mweststrate/Desktop/react-native/ReactAndroid/build/tmp/buildReactNdkLib/local/armeabi-v7a/objs/folly_json/folly/FileUtil.o] Error 1
make: *** Waiting for unfinished jobs....
fcntl(): Bad file descriptor
make: Entering directory '/Users/mweststrate/Desktop/react-native/ReactAndroid/src/main/jni/react/jni'
[armeabi-v7a] Compile++ thumb: folly_json <= Demangle.cpp
```

No idea if it is related. I guess not since without making the change I got the same error.

Reviewed By: mweststrate

Differential Revision: D23767388

Pulled By: fkgozali

fbshipit-source-id: 35f0d3ddec41942f5bbc96cb391975d84729ef5e

# Conflicts:
#	RNTester/README.md
#	packages/rn-tester/Podfile.lock