Add make java.dependencyTag installable or not

java.dependencyTag now has a new field installable which contols whether
the dependency should be added as the install dep of the app or not.

This allows us to model all the dependency tags for Java using the same
struct.

Bug: N/A
Test: m
Change-Id: I9b1c7809a0bde3f15579aefd9bb34d828764b84b