This change adds "platform_managed_app: yes" to the application
metadata, indicating it should be managed by the application
framework.
Test Plan:
PASS: build-pkgs and build-image
PASS: upload and apply application
PASS: check auto update to next version
PASS: remove and delete application
Partial-bug: 2120187
Change-Id: I2d268e2f15e74ad0b72ae618f77fb76d28593c26
Signed-off-by: Eduardo dos Santos França <Eduardo.dosSantosFranca@windriver.com>