Fix missing NOTICE targets for static libs that aren't available to
platform.

The NOTICE file generation depends on the NOTICE targets for all static
library dependencies. If such a dependency didn't have
//apex_available:platform it didn't get any AndroidMk entry and hence
no NOTICE target via soong_cc_prebuilt.mk. If it was then depended upon
by a binary or library that is accessible to platform, the NOTICE
dependency failed.

Normally such a dependency is invalid, but there are corner cases where
binaries go neither into platform nor any APEX module, and they can
legitimately have such dependencies (cf. b/152241137).

With this CL requests to skip installation of such a static libraries
are ignored so that they get AndroidMk entries, which will always have
LOCAL_UNINSTALLABLE_MODULE set.

Test: "m simpleperf_ndk" with https://r.android.com/1273016, which
  removes //apex_available:platform from libs that simpleperf_ndk
  depends on statically.
Bug: 152241137
Bug: 149217815
Change-Id: If36e85dd16ade56d4ec1d6744811df5a15b6242c
diff --git a/cc/cc.go b/cc/cc.go
index de07229..aea9b51 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -389,6 +389,7 @@
 	inSanitizerDir() bool
 	hostToolPath() android.OptionalPath
 	relativeInstallPath() string
+	skipInstall(mod *Module)
 }
 
 type xref interface {
@@ -2590,6 +2591,14 @@
 	return c.InRecovery()
 }
 
+func (c *Module) SkipInstall() {
+	if c.installer == nil {
+		c.ModuleBase.SkipInstall()
+		return
+	}
+	c.installer.skipInstall(c)
+}
+
 func (c *Module) HostToolPath() android.OptionalPath {
 	if c.installer == nil {
 		return android.OptionalPath{}