health@2.0-impl: recovery_available: true

... so that it can be installed to recovery image.
Test: build and inspect out dir
Test: boot to recovery and 'adb shell ls /vendor/lib64/hw'
Bug: 80132328

Change-Id: Icb33c9e9e648b54db33cac23ed877392cce4e76b
Merged-In: Icb33c9e9e648b54db33cac23ed877392cce4e76b
(cherry picked from commit 4e40086d)