[automerger skipped] Merge "Add experiment flag namespace for Multi-Gen LRU" into tm-qpr-dev am: eaa1efab71 -s ours am: b1c5023d7a -s ours

am skip reason: Merged-In I2aa7032de2c45385e4c0ada787ba7799e50c8a53 with SHA-1 560d8cc5ab is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20468830

Change-Id: I37f2c375b353484a3375daa0617ad2a970c2c84e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>