Add support for no-vendor-variant VNDK

When no-vendor-variant VNDK is enabled, the vendor variant of VNDK
libraries are not installed.  Since not all VNDK libraries will be
ready for this, we keep a list of library names in cc/vndk.go to
indicate which libraries must have their vendor variants always
installed regardless of whether no-vendor-variant VNDK is enabled.

Also add --remove-build-id option to the strip script to facilitate
the check of functional identity of the two variants.

Bug: 119423884
Test: Add a dummy VNDK library and build with
      TARGET_VNDK_USE_CORE_VARIANT := true, with the corresponding
      build/make change.

Change-Id: Ieb1589488690e1cef1e310669a8b47a8b8759dac

cc/library.go

@@ -293,6 +293,10 @@ type libraryDecorator struct {
 
 	post_install_cmds []string
 
+	// If useCoreVariant is true, the vendor variant of a VNDK library is
+	// not installed.
+	useCoreVariant bool
+
 	// Decorated interafaces
 	*baseCompiler
 	*baseLinker
@@ -914,6 +918,9 @@ func (library *libraryDecorator) install(ctx ModuleContext, file android.Path) {
 			if ctx.isVndkSp() {
 				library.baseInstaller.subDir = "vndk-sp"
 			} else if ctx.isVndk() {
+				if ctx.DeviceConfig().VndkUseCoreVariant() && !ctx.mustUseVendorVariant() {
+					library.useCoreVariant = true
+				}
 				library.baseInstaller.subDir = "vndk"
 			}