Add libraryDependencyTag to track dependencies on static and shared libraries

dependencyTag uses a set of predefined tags to identify different types
of dependencies.  There are already multiple bits of metadata stored
in the dependency tag (Library, Shared, ReexportFlags), and supporting
them all requires a combinatorial explosion of predefined tags and
causes issues when using equality comparisons if a new bit of metadata
is added.

Add a new libraryDependencyTag type that will contain the metadata
bits, and replace the quality comparisons with checks on the metadata
bits.

There are 5 TODOs where modifying the checks identified problems with
the existing checks.  These were left in place to produce identical
build output and will be fixed separately.

Bug: 162437057
Test: no change to build.ninja or {Android,make_vars,late}-${TARGET_PRODUCT}.mk
Change-Id: I72d4207dcf381c07c92e00e5a03968ebb5ed8d30

cc/vndk.go

@@ -26,6 +26,8 @@ import (
 	"android/soong/android"
 	"android/soong/cc/config"
 	"android/soong/etc"
+
+	"github.com/google/blueprint"
 )
 
 const (
@@ -127,7 +129,7 @@ func (vndk *vndkdep) typeName() string {
 	return "native:vendor:vndkspext"
 }
 
-func (vndk *vndkdep) vndkCheckLinkType(ctx android.ModuleContext, to *Module, tag DependencyTag) {
+func (vndk *vndkdep) vndkCheckLinkType(ctx android.ModuleContext, to *Module, tag blueprint.DependencyTag) {
 	if to.linker == nil {
 		return
 	}