Adds constants for Cross-Origin-Embedder-Policy(-Report-Only)? headers ([W3](https://wicg.github.io/cross-origin-embedder-policy/#COEP)).

RELNOTES=Adds constants for `Cross-Origin-Embedder-Policy(-Report-Only)?` headers.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=309944590

Author: mikispag

android/guava/src/com/google/common/net/HttpHeaders.java

@@ -266,6 +266,21 @@ private ReferrerPolicyValues() {}
    * @since 20.0
    */
   public static final String X_WEBKIT_CSP_REPORT_ONLY = "X-WebKit-CSP-Report-Only";
+  /**
+   * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP">{@code
+   * Cross-Origin-Embedder-Policy}</a> header field name.
+   *
+   * @since NEXT
+   */
+  public static final String CROSS_ORIGIN_EMBEDDER_POLICY = "Cross-Origin-Embedder-Policy";
+  /**
+   * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP-RO">{@code
+   * Cross-Origin-Embedder-Policy-Report-Only}</a> header field name.
+   *
+   * @since NEXT
+   */
+  public static final String CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY =
+      "Cross-Origin-Embedder-Policy-Report-Only";
   /**
    * The HTTP Cross-Origin-Opener-Policy header field name.
    *

guava/src/com/google/common/net/HttpHeaders.java

@@ -266,6 +266,21 @@ private ReferrerPolicyValues() {}
    * @since 20.0
    */
   public static final String X_WEBKIT_CSP_REPORT_ONLY = "X-WebKit-CSP-Report-Only";
+  /**
+   * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP">{@code
+   * Cross-Origin-Embedder-Policy}</a> header field name.
+   *
+   * @since NEXT
+   */
+  public static final String CROSS_ORIGIN_EMBEDDER_POLICY = "Cross-Origin-Embedder-Policy";
+  /**
+   * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP-RO">{@code
+   * Cross-Origin-Embedder-Policy-Report-Only}</a> header field name.
+   *
+   * @since NEXT
+   */
+  public static final String CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY =
+      "Cross-Origin-Embedder-Policy-Report-Only";
   /**
    * The HTTP Cross-Origin-Opener-Policy header field name.
    *