soong: Add product variable DevicePageSizeAgnostic

The product variable DevicePageSizeAgnostic will determine
whether AOSP is kernel page size agnostic or not.

Test: source build/envsetup.sh
      lunch aosp_cf_arm64_phone_pgagnostic
      m
      cat out/soong/build.aosp_cf_arm64_phone_pgagnostic.ninja | grep __BIONIC_NO_PAGE_SIZE_MACRO
Bug: 289419664
Change-Id: I33a1a4f1967d7e78432b7b8d90357d16b2002dcc
diff --git a/android/config.go b/android/config.go
index eb89493..efc977b 100644
--- a/android/config.go
+++ b/android/config.go
@@ -190,6 +190,12 @@
 	return String(c.config.productVariables.DeviceMaxPageSizeSupported)
 }
 
+// PageSizeAgnostic returns true when AOSP is page size agnostic,
+// othersise it returns false.
+func (c Config) PageSizeAgnostic() bool {
+	return Bool(c.config.productVariables.DevicePageSizeAgnostic)
+}
+
 // The release version passed to aconfig, derived from RELEASE_VERSION
 func (c Config) ReleaseVersion() string {
 	return c.config.productVariables.ReleaseVersion
diff --git a/android/variable.go b/android/variable.go
index 03a80c1..d59e367 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -95,10 +95,6 @@
 			Cflags []string
 		}
 
-		Device_page_size_agnostic struct {
-			Cflags []string `android:"arch_variant"`
-		} `android:"arch_variant"`
-
 		Override_rs_driver struct {
 			Cflags []string
 		}
@@ -232,6 +228,7 @@
 	DeviceCurrentApiLevelForVendorModules *string  `json:",omitempty"`
 	DeviceSystemSdkVersions               []string `json:",omitempty"`
 	DeviceMaxPageSizeSupported            *string  `json:",omitempty"`
+	DevicePageSizeAgnostic                *bool    `json:",omitempty"`
 
 	RecoverySnapshotVersion *string `json:",omitempty"`
 
@@ -287,7 +284,6 @@
 	Safestack                    *bool    `json:",omitempty"`
 	HostStaticBinaries           *bool    `json:",omitempty"`
 	Binder32bit                  *bool    `json:",omitempty"`
-	Device_page_size_agnostic    *bool    `json:",omitempty"`
 	UseGoma                      *bool    `json:",omitempty"`
 	UseRBE                       *bool    `json:",omitempty"`
 	UseRBEJAVAC                  *bool    `json:",omitempty"`
@@ -532,6 +528,7 @@
 		DeviceSecondaryCpuVariant:  stringPtr("generic"),
 		DeviceSecondaryAbi:         []string{"armeabi-v7a", "armeabi"},
 		DeviceMaxPageSizeSupported: stringPtr("4096"),
+		DevicePageSizeAgnostic:     boolPtr(false),
 
 		AAPTConfig:          []string{"normal", "large", "xlarge", "hdpi", "xhdpi", "xxhdpi"},
 		AAPTPreferredConfig: stringPtr("xhdpi"),
@@ -544,7 +541,6 @@
 		Safestack:                    boolPtr(false),
 		TrimmedApex:                  boolPtr(false),
 		Build_from_text_stub:         boolPtr(false),
-		Device_page_size_agnostic:    boolPtr(false),
 
 		BootJars:     ConfiguredJarList{apexes: []string{}, jars: []string{}},
 		ApexBootJars: ConfiguredJarList{apexes: []string{}, jars: []string{}},