Add JSpecify as a build dependency without using it yet.

The CL in which I begin using it has gotten very large, so I'm splitting it up where possible.

RELNOTES=n/a
PiperOrigin-RevId: 707910697

android/guava-testlib/pom.xml

@@ -14,6 +14,10 @@
     unit testing - particularly to assist the tests for Guava itself.
   </description>
   <dependencies>
+    <dependency>
+      <groupId>org.jspecify</groupId>
+      <artifactId>jspecify</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>

android/guava-tests/pom.xml

@@ -21,6 +21,10 @@
       <version>${project.version}</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.jspecify</groupId>
+      <artifactId>jspecify</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>

android/guava/pom.xml

@@ -28,6 +28,10 @@
       <artifactId>listenablefuture</artifactId>
       <version>9999.0-empty-to-avoid-conflict-with-guava</version>
     </dependency>
+    <dependency>
+      <groupId>org.jspecify</groupId>
+      <artifactId>jspecify</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>

android/pom.xml

@@ -417,6 +417,11 @@
   </distributionManagement>
   <dependencyManagement>
     <dependencies>
+      <dependency>
+        <groupId>org.jspecify</groupId>
+        <artifactId>jspecify</artifactId>
+        <version>1.0.0</version>
+      </dependency>
       <dependency>
         <groupId>com.google.code.findbugs</groupId>
         <artifactId>jsr305</artifactId>

guava-testlib/pom.xml

@@ -14,6 +14,10 @@
     unit testing - particularly to assist the tests for Guava itself.
   </description>
   <dependencies>
+    <dependency>
+      <groupId>org.jspecify</groupId>
+      <artifactId>jspecify</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>

guava-tests/pom.xml

@@ -21,6 +21,10 @@
       <version>${project.version}</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.jspecify</groupId>
+      <artifactId>jspecify</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>

guava/pom.xml

@@ -28,6 +28,10 @@
       <artifactId>listenablefuture</artifactId>
       <version>9999.0-empty-to-avoid-conflict-with-guava</version>
     </dependency>
+    <dependency>
+      <groupId>org.jspecify</groupId>
+      <artifactId>jspecify</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>

integration-tests/gradle/build.gradle.kts

@@ -9,6 +9,7 @@ val expectedReducedRuntimeClasspathAndroidVersion =
     "guava-${guavaVersionJre.replace("jre", "android")}.jar",
     "failureaccess-1.0.2.jar",
     "j2objc-annotations-3.0.0.jar",
+    "jspecify-1.0.0.jar",
     "jsr305-3.0.2.jar",
     "checker-qual-3.43.0.jar",
     "error_prone_annotations-2.36.0.jar",
@@ -19,6 +20,7 @@ val expectedReducedRuntimeClasspathJreVersion =
     "guava-$guavaVersionJre.jar",
     "failureaccess-1.0.2.jar",
     "j2objc-annotations-3.0.0.jar",
+    "jspecify-1.0.0.jar",
     "jsr305-3.0.2.jar",
     "checker-qual-3.43.0.jar",
     "error_prone_annotations-2.36.0.jar",

pom.xml

@@ -412,6 +412,11 @@
   </distributionManagement>
   <dependencyManagement>
     <dependencies>
+      <dependency>
+        <groupId>org.jspecify</groupId>
+        <artifactId>jspecify</artifactId>
+        <version>1.0.0</version>
+      </dependency>
       <dependency>
         <groupId>com.google.code.findbugs</groupId>
         <artifactId>jsr305</artifactId>