keystore2: Remove explicit dep on C DSOs

This was previously added as a hack to work around a build system bug in
which rlib dependencies would not result in their corresponding C DSOs
being installed on the device. Now that it is fixed, we can remove this.

Bug: 187412695
Test: m installclean && m; boot AVD
Change-Id: I61f14d7a60e80034d24f0e6e4c3a8e2ea8831c96
1 file changed