Remove bad make rules causing system.img to rebuild every time

ALL_DEFAULT_INSTALLED_MODULES is supposed to contain paths, not
module names.  Module names are phony targets, which causes
anything that depends on it to be always dirty, resulting in
rebuilding system.img on every incremental build.

ALL_DEFAULT_INSTALLED_MODULES shouldn't be used anyways, use
PRODUCT_PACKAGES in a product makefile instead, and all_modules
isn't used at all any more, remove both of them.

Bug: 36274890
Test: builds
Change-Id: I2db49dcc27515357b0306d0c3e9b38026012b1ea