Clear previous installs that may be cached

- Fixes the error:

Exception thrown during onBeforeAll invocation of plugin com.android.tools.utp.plugins.host.apkinstaller.AndroidTestApkInstallerPlugin.
Failed to install APK(s): /home/runner/work/leakcanary/leakcanary/leakcanary/leakcanary-android/build/outputs/apk/androidTest/debug/leakcanary-android-debug-androidTest.apk
INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES
com.android.ddmlib.InstallException: INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES
	at com.android.ddmlib.internal.DeviceImpl.installRemotePackage(DeviceImpl.java:1409)

Author: blundell

.github/workflows/main.yml

@@ -95,10 +95,20 @@ jobs:
           arch: ${{ matrix.arch }}
           emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none -no-snapshot-save
           script: |
+            # Attempt to clear existing installs that might conflict with cached snapshots
+            # Use || true to prevent the script from failing if the app isn't installed
+            # We could avoid using this command if we use a debug keystore to guarantee apk compatibility
+            for pkg in $(adb shell pm list packages leakcanary | cut -d ':' -f 2 | tr -d '\r'); do
+              echo "Uninstalling existing package: $pkg"
+              adb uninstall $pkg || true
+            done
             touch emulator.log                    # create log file
             chmod 777 emulator.log                # allow writing to log file
             adb logcat >> emulator.log &          # pipe all logcat messages into log file as a background process
-            ./gradlew leakcanary:leakcanary-android-core:connectedCheck leakcanary:leakcanary-android:connectedCheck leakcanary:leakcanary-android-instrumentation:connectedCheck --no-build-cache --no-daemon --stacktrace
+            ./gradlew leakcanary:leakcanary-android-core:connectedCheck \
+                      leakcanary:leakcanary-android:connectedCheck \
+                      leakcanary:leakcanary-android-instrumentation:connectedCheck \
+                      --no-build-cache --no-daemon --stacktrace
       - name: Upload results
         if: ${{ always() }}
         uses: actions/upload-artifact@v4