Fix malformed CtsTestStubs manifest entries.

The <action> and other elements must be enclosed within an
Intent filter, otherwise they are ignored by the system
and messages like the following are printed to the log:

01-10 01:44:16.132 W/PackageParser(  195): Problem in package
    /data/app/vmdl-1512176943.tmp:
01-10 01:44:16.132 W/PackageParser(  195): Unknown element under
    <activity>: category at /data/app/vmdl-1512176943.tmp Binary XML
    file line #765

Change-Id: I100acc5df504010ea483c78a83a481955d989956
1 file changed