Upgrade folly to v2020.02.17.00 (#809)

Summary:
# Summary

Folly became once again incompatible with the Android NDK, which caused our CI to fail to produce sample APK builds on release. I managed to repro this on my machine and it's working again now.

Sadly, I had to patch another file manually because something about the template parameter inference wasn't working ...

# Notes

This was done by first bumping the version, then going through the compiler errors and simply removing the lines that the C++ compiler in the NDK had trouble inferring the types for. We were lucky in that the exported symbols this affected weren't actually used, so I copied over the file to `overrides/Folly/` and set up another copy rule in Gradle.

# Meta

Pull Request resolved: https://github.com/facebook/flipper/pull/809

Test Plan:
```
./gradlew :sample:assembleDebug
```

Internal, external CI.

Reviewed By: mweststrate

Differential Revision: D19948797

Pulled By: passy

fbshipit-source-id: b2e98d3a5c89b0fc77c157683cde90997232fee0

android/third-party/overrides/Folly/CMakeLists.txt

@@ -95,7 +95,6 @@ list(APPEND SRC_FILES ${FOLLY_DIR}/io/async/HHWheelTimer.cpp
                       ${FOLLY_DIR}/SocketAddress.cpp
                       ${FOLLY_DIR}/Executor.cpp
                       ${FOLLY_DIR}/FileUtil.cpp
-                      ${FOLLY_DIR}/lang/ColdClass.cpp
                       ${FOLLY_DIR}/lang/Assume.cpp
                       ${FOLLY_DIR}/json.cpp
                       ${FOLLY_DIR}/Unicode.cpp