Make BaseApiAnalyzer#getJavaProject protected

Currently there is no way to pass the project to the analyzer without
having an project ProjectComponent, but users of BaseApiAnalyzer might
have other means to find the project in question.

This makes the BaseApiAnalyzer#getJavaProject() protected so
implementors can override this (e.g. Tycho).

apitools/org.eclipse.pde.api.tools/src/org/eclipse/pde/api/tools/internal/builder/BaseApiAnalyzer.java

@@ -185,7 +185,7 @@ public BaseApiAnalyzer() {
 	public void analyzeComponent(final BuildState state, final IApiFilterStore filterStore, final Properties preferences, final IApiBaseline baseline, final IApiComponent component, final IBuildContext context, IProgressMonitor monitor) {
 		SubMonitor localMonitor = SubMonitor.convert(monitor, BuilderMessages.BaseApiAnalyzer_analyzing_api, 6);
 		try {
-			fJavaProject = getJavaProject(component);
+			this.fJavaProject = getJavaProject(component);
 			this.fFilterStore = filterStore;
 			this.fPreferences = preferences;
 			if (!ignoreUnusedProblemFilterCheck()) {
@@ -2665,7 +2665,7 @@ public void checkBaselineMismatch(IApiBaseline baseline, IApiBaseline workspaceB
 	 * @param component API component
 	 * @return Java project or <code>null</code>
 	 */
-	private IJavaProject getJavaProject(IApiComponent component) {
+	protected IJavaProject getJavaProject(IApiComponent component) {
 		if (component instanceof ProjectComponent pp) {
 			return pp.getJavaProject();
 		}