Add EnabledSupplier in ManifestFileGroupPopulator

Add EnabledSupplier to provide ability to enable/disable the populator after adding it to MDD. Copied from PhFileGroupPopulator. https://source.corp.google.com/piper///depot/google3/java/com/google/android/libraries/mdi/download/populator/PhFileGroupPopulator.java;l=46;bpv=0;bpt=1;rcl=502128408

Test: local test

Bug: 265797474
Change-Id: Ife7dd6e7e3c8f8281b2ba9f0fc3ac1b515e0f037
1 file changed