Merge "Allow GenericDocument accept a String property longer than 20_000." into sc-dev am: 7ae2dec8ba am: 4816863ed4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15306276

Change-Id: Ibe3c15a0592969e4dfd3cbeda67c1a5513a94047