DO NOT MERGE: Add DENSITY_450

Add 450dpi as a supported screen density.
This change follows up below change Id : Iac673eae2d82c27d96e279c076454af2f5933208

Originally 600dpi was added to support sw384 with WQHD resolution,
though it was lack of for the cases when resolution is FHD resolution. (In case of other resolutions, there already exist 300 and 200 for HD and WVGA resolutions).

Bug: 78283907
Test: run android.dpi.cts.ConfigurationTest#testScreenConfiguration and android.app.cts.ActivityManagerMemoryClassTest#testGetMemoryClass
(cherry picked from commit 13ca0450ede3eedf7d34bbd0b69525cb6ebc63f1)

Change-Id: Ide0baba183c7dea962610d16f18fecbd0dc62567

api/current.txt

@@ -47843,6 +47843,7 @@ package android.util {
     field public static final int DENSITY_400 = 400; // 0x190
     field public static final int DENSITY_420 = 420; // 0x1a4
     field public static final int DENSITY_440 = 440; // 0x1b8
+    field public static final int DENSITY_450 = 450; // 0x1c2
     field public static final int DENSITY_560 = 560; // 0x230
     field public static final int DENSITY_600 = 600; // 0x258
     field public static final int DENSITY_DEFAULT = 160; // 0xa0

core/java/android/util/DisplayMetrics.java

@@ -156,6 +156,14 @@ public class DisplayMetrics {
      */
     public static final int DENSITY_440 = 440;
 
+    /**
+     * Intermediate density for screens that sit somewhere between
+     * {@link #DENSITY_XHIGH} (320 dpi) and {@link #DENSITY_XXHIGH} (480 dpi).
+     * This is not a density that applications should target, instead relying
+     * on the system to scale their {@link #DENSITY_XXHIGH} assets for them.
+     */
+    public static final int DENSITY_450 = 450;
+
     /**
      * Standard quantized DPI for extra-extra-high-density screens.
      */