Add dalvik.vm.dex2oat-resolve-startup-strings feature flag

Mapped to the corresponding dex2oat option:
--resolve-startup-const-strings=true|false

Bug: 116059983
Test: setprop dalvik.vm.dex2oat-resolve-startup-strings true
Test: compile an app

(cherry picked from commit 1b2bb04c)

Merged-In: I128436c6b8d3d9ebcc3dbb49160c732b061ba008
Change-Id: I8d2cd1c4f69c01bb8f4dbe1402fcee8f85c243af