Add option to enable tracing all the launches.

This option is disabled by default.

Bug: b/129888684, b/130154337

Test : Ran app launch test case locally.

Change-Id: I1305361adf0cb80e2be6a191b8639f7a53e9abfc
(cherry picked from commit 806aa81113c8bbbb7c4566f0b87858dc2f41a3b6)
1 file changed